Comment by OutOfHere
Signal is lacking a crucial safety feature. To cover some background, it is necessary to set "Who can see my number" and "Who can find me by number" both to "Nobody", as this lowers the chances of spam messages and attempted hacks. Once these are set, the only way for someone to start a conversation with you is if they know your Signal username or QR link, both of which you can set in your Profile. The issue is that your link can be saved unsafely by your Contacts, and can be used multiple times, also by others, leaking it to hackers who can then send you unsolicited messages to compromise your device. The safety feature that would be good to have is to allow someone to contact me only via a one-time use link that cannot be reused by anyone.
This sounds like an excellent feature request that would shore up their anti-abuse endeavors more than them "lacking a very basic crucial safety feature".
Which of the so-called Signal competitors have implemented something like this already today?