Peggy, unfortunately that presumes an ounce of sense on their part.
I won't give the little dillwads any ideas but stating exactly how, here - but they'll just change their methods if they realize they are being ignored, I've seen it a hundred times before.
Mostly they just 'talk', as it were to hear the sound of their own 'voice'...whether we respond or not matters less to them than it used to when such tactics did work - but the most recent generations of these creeps just don't seem to care.
Pulling the posts would stop them, and would put a dent in it for sure because they then cannot go back and drool over their own posts, which is more than half the reason they do this.
Contacting their providers and getting them canned is also a significant deterrent, as it having them hauled into Juvie court for a Judge to hand them a couple weeks worth of community service - which, in my opinion, is a very proper response to a little punk like this.....if he has so much free time on his hands that he's doing this, he can then put it into something actually useful while learning a valuable life lesson.
Of course, I happen to be less civilized in person - but little punks like these guys never leave the house anyway, given that their very nature eventually causes everyone who knows them personally to want their head on a plate, so that's a moot point anyhow.