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Discussion (17 Comments)Read Original on HackerNews
Result: All routes to non-cooperating networks get dropped within days to weeks and scam-calling stops being a lucrative business basically instantly.
Now, my only worry is that I might get a call from someone who I need to talk to, but is blocked and I won't even know it. For example, what if I get an emergency call from police/fire/hospital and I won't even know it. I also tried using "Screen unknown caller" feature, but then, no one likes them and sometimes they think it is AI bot and they usually just hang up (which is great for spam caller but not for legitimate caller)
My only solution that I could think of is to have a dedicated phone line just for friends/family/work, and a second line for banking/shopping/utilities/everything else.
And further to that, the elderly are also the ones who cannot block unknown numbers, because doctors’ offices seem to have random numbers they call you from (they may have a pool of numbers but it’s not reasonable to add all of them to contacts). Blocking all unknowns would block these important health related calls as well.
This is a huge issue with scam/security awareness education. Too many legitimate orgs use the exact behaviors we tell people to avoid. Same thing with email, can't tell someone to never click links in emails when services keep relying on magic links, third-party notification domains, etc. SPF, DKIM, and DMARC do nothing because scammers will just typosquat.
In the phone number example, most of those numbers too are unlisted outbound numbers, you couldn't even google them to verify.
Half the battle is getting legitimate organizations to stop acting like scammers in the first place so that shady behavior becomes an obvious red flag again.
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Notes:
1. Incidentally, the first and second largest-circulation magazines in the US now: <https://www.magazineline.com/blog/most-popular-magazines-in-...>.
The other element is that carriers can act at the network level, noting how much abusive traffic arrives from given peers, and taking direct action against those peers. That could involve rejecting traffic outright, subjecting it to stronger challenges, and/or diverting it to investigative / law-enforcement bodies (I'd suggest both national and state entities) for both tracking and enforcement. Power-law relations mean that at any given time, a small number of networks will account for the overwhelming majority of spam, though which networks will likely change over time.
The key problem with this is getting the carriers to act, which ... will probably involve a few carrots and sticks. I'll address those in another comment, except to mention bonding: <https://oag.ca.gov/consumers/general/telreg>.[1]
Individual action will not solve this problem, but there are steps you can take.
Most major US carriers now offer some form of robocall blocking. "Scam Shield" from T-Mobile, "ActiveArmor" from AT&T, "Call Filter" from Verizon.
MVNOs (mobile virtual network operators) may or may not offer scam / robocall blocking themselves (though IMO they should, and should be required to). Some will identify spam calls, but those are still passed through to your handset.
Beyond this, there are on-device apps which can be used, some are carrier-based (e.g., "Call Filter Plus", from Verizon, similar tools exist for Verizon and AT&T), some are third-party. These of necessity share your voice/text activity with third parties, which is its own concern and consideration.
Full Android, iOS, and several full-featured Android alternatives (GrapheneOS, /e/OS, LineageOS, etc.) offer unknown caller rejection. Numbers not in your contact list are directed to voicemail. At present, few spam calls will leave voicemail, though some do, and as AI expands in capabilities, applications, and adoption this will all but certainly increase. I'd strongly encourage use of this.
The company everyone loves to hate, Comcast/Xfinity, actually has one of the most sophisticated voice/text spam blocking systems, and one I'd like to see mandated to all carriers: <https://www.xfinity.com/support/articles/spam-blocker-overvi...>
It's risk based.
It classifies calls into three categories: high, medium, and low risk.
It adjudicates calls based on risk.
High-risk calls are terminated entirely.
Medium-risk calls are directed to voicemail.
Low-risk calls are subjected to an audio CAPTCHA (enter a two digit value to ring through), otherwise are directed to voicemail.
(It's not clear whether or not a whitelisted number will escape any treatment, perhaps subject to conditions such as originating from the appropriate/approved network for that call.)
I haven't used that system, but in advising people still moving off landlines, or looking at VOIP solutions, it's making Comcast an attractive option.
(I don't know what other VOIP providers, say, Twillo or Asterisk, offer, but suspect at least some have similar if not more-capable systems.)
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Notes:
1. California requires a $100,000 bond by all telemarketers in the state. The state has a small fraction of the incidence of robocalls of the worst US states. Several others have some bond. My view is that bonding should apply at the carrier level and be surrenderable to both contacted individuals and downstream peering networks, to provide both a strong financial penalty to abusers, and an incentive to downstream networks to pursue abusive calls.
Phone numbers are a scare resource and the telecommunications networks heavily regulated with numerous central points of control.
This bullshit is scaling because the companies which gate and sell that access have no obligations, legal or otherwise, to deny scammers access to their resources.
And I think this is also a problem at the habit/behavior level for people. Most people don't want to know how to set proper boundaries with people and technology and articulate what they want. Once you do that at least you can articulate what you want to come in at you or not.
Without that you get stuck with a weird one-size-fits-all policy which definitely doesn't fit for me at least.