Any communication medium that isn't controlled or censored will break under a deluge of spam.
Any communication medium that isn't controlled or censored will break under a deluge of spam.
If someone tried to build an app on one of those systems where you were forced to accept messages by default until you blacklisted them then it probably would. It would be terrible.
Thankfully no users actually want apps like that, we've already got email and web social media sites for having a public directory of strangers to contact. That is a use-case that is only sometimes needed, and when it is you only need to use it once.
It also doesn't really work. You have to choose between not gettimg messages from those outside your circle of trust or getting spammed.
Perhaps when I have a few hundred million to invest in a better platform I'll reach out! (One can dream).
For example, if it costs someone $0.00001 to send you a packet, that could still be decentralized but the economics change a lot. Maybe for the better.