Sorry I misframed it. I mean that since there's no need to reveal phone numbers, there could be an opportunity for spammers to increase spam by creating many accounts, and Signal should preemptively find ways where such spams could be reduced. However, I realized after posting that the article says we still need to sign up to signal with a phone number. However, there's still the risk of impersonation (by writing someones username with tiny changes) and people trying to add vulnerable users by username (which they might be using on other platforms) instead of phone number.
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Signal is publicly testing letting users add usernames to their accounts so they don’t have to share their phone number to connect via the encrypted messaging service.
The test was announced via a post on the Signal forums by VP of engineering Jim O’Leary, who referred to the feature as “pre-beta” and warned that there’ll be rough edges including crashes and broken push notifications.
Although accounts will still be associated with a traditional mobile number at setup, the username feature means you’ll be able to connect with and message other users without having to share what can be an important personally identifiable piece of information.
PCMag points to a note in the service’s wiki mentioning that signs of the feature cropped up as early as 2019, and Whittaker has been open about the Signal’s plans for it.
There are indicators that competitor WhatsApp is working on a similar feature, though the Meta-owned messaging service is typically less open about its future development plans.
But the ease of installing these test clients varies, and you’ll only be able to talk to other users running similar pre-release software.
How come the only people I ever meet that use these weird messaging apps are drug dealers and immigrants? 99% of people I meet use Snapchat or Facebook Messenger to talk to people if not SMS, only time I hear about Whatsapp IRL it's the sketchiest people.
While I'm on the subject, is the person who designs the Snapchat user interface from this planet? Do they have severe mental deficiencies? It's really the worst UI of any app or program I've ever experienced.
Spammers use fake phone numbers all the time on the regular phone service
The phone calls just use fake caller ID. Caller ID is entirely unauthenticated and the recipient just blindly trusts the sender, so scammers use sketchy VoIP services that let you override the caller ID without actually proving you own that number. Work is being done to improve this: https://www.fcc.gov/call-authentication
That's means it's trivial to use a fake number for outgoing calls, but the spammers can't actually receive incoming calls or texts to those numbers.