[notriddle]

Not "abuse" as in "targeted bullying". Abuse" as in "untargeted spam".

Just look at what happened to IRC. And Usenet. And Email. Heck, even the Fediverse. The major providers colluded in the form of de-facto network-wide blacklists as a way to counter spam, ultimately centralizing control of the network. People stick to the major providers that participate in the blacklist because, while a few people will occasionally be unjustly kicked out, most of the time it actually works pretty well and the major providers aren't flooded with garbage.

[malvosenior]

I took the "safer" in the OP to mean harassment but totally agree with you on your point. It goes to what I was saying about centralization offering better technical advantages.