Re: Needed: prosocial data diode for amplifier
They have, yes.
It is also noteworthy that most of the current sites reward short ill thought out rants over longer and more considered posts.
This is particular to these sites: it did not used to happen on forums predating facebook. Of course, this also ignores that people have declining social skills due to reliance on electronic communication and are starting to use websites at a much younger age than was once the case.