I don't think you can really do anything about them. It is really just people using an exaggerated description to convey their feelings in a succinct soundbite - I don't think anyone who uses those titles really does want to smash their hairdressers teeth in etc...
Well, er, me a bit, unsurprisingly [sheepish], having been the instigator of a thread title change this evening
I think often children are reading over shoulders, we have to take into account that some people object very strongly to the word 'cunt' etc and that whilst I think everyone should be free to speak their minds in a thread, we should all be a bit more circumspect when it comes to thread titles.
fwiw, I dont' object to cunting and fucking, no worries about over-the-shoulder readers here, and I've read all the Harry Potter books. BUT that's not the same for all of us, is it?
I do think from a PC slant that it would be totally unacceptable to start a thread saying "My DW is a cunt, I want to smack her in the gob", where as it is perfectly acceptable to say the same thing about your DH. It's not big and it's not clever whoever is on the receiving end.
Don't particularly like them but think trying to stop them is like any censorship, it's difficult to draw a reasonable line and that line can become very subjective. One person's humour is another person's offence.