Translation: "I don't know how to use social media prudently, so I'm just going to say it's terrible". Seriously, is it so much trouble to think before hitting that post button?
"Social media is, on the whole, a very bad thing. It wastes time, gives at best ephemeral pleasure with a modicum of interest, causes privacy and necessary social boundaries to disintegrate, and enriches people very much at the expense of others. Anyone can make a statement they later regret. It is now impossible to genuinely retract or escape such a statement. This is outrageous. Social media brings out the very worst in people. Rather than free speech, ot also promotes - essentially requires - a ridiculous level of self-censorship or imposition of extreme global shaming. This is not a societal good."
-Ralph, comment on "How One Stupid Tweet Blew Up Justine Sacco’s Life", The New York Times Magazine
Don't even who Sacco (?) is, but mostly morons type something in social media without thinking what it may cause + it was already something potentially horrible in the first place.
I don't really see how a person who tends to think things through will get duped into posting crap in a web-page he/she maintains.
(a major other case is if the person had little experience with such things, or is very young anyway, of course).