Normal people will never learn about this , and doing it right would take too much effort. While I would love new better social media to take over, I don't think social media which serves it's users is possible.
Hell, I self sensor more here than I do in real life. In real life if I say something odd it's forgotten within minutes.
EDIT: I didn’t realize initially this is UDP, but I think there is a similar solution like TLS for TCP
Why bother , move fast and break things yo
Sure getting it right might be hard, but getting it somehow good enough to not be obviously bad is much less so.
Not only are there thinks like DTLS, in the worst case you could just "ship" a AES key when you login over TCP/TLS and then you encrypt any udp message with that key or something like that. Sure there are many ways you can get it wrong but it's easy to setup and better then plaintext.