I personally believe that stems from the popular social platforms forcing you to give up your controlling interest in copyright, preventing you from suing a troll forum for republication of your protected works without your consent, since you openly divested yourself of that right when you tweeted.

Under US law anyways, it is absolutely not okay to republish a written conversation without permission under copyright law to do so, unless you fall under the "fair use" exemptions. It is safe to say that most forms of attack would not pass a "fair use" test in the courts. So if more people were to sue over copyright violations and demand the unmasking of who posted and/or those who operate, that would certainly go a long ways towards resolving that imbalance.

Sadly, it's a very expensive process, and it's very cheap to violate copyright.