Jesus, where to begin...
People that use or write "I would of", instead of "I would have" or the informal contraction "I would've".

FUCK, that makes me want to commit murder. Violent, horrible murder, possibly using a dictionary as some sort of giant wordy cudgel.
(square go, Mon 12 Apr 2010, 22:36, 6 replies)

very good words there
you obviously live near me!
(Purpledoris I've got afeckin' job, Mon 12 Apr 2010, 22:45, closed)

Here
www.couldof.com/
( sandettie light vessel automatic New Twitter - @bollocksreally, Mon 12 Apr 2010, 22:56, closed)

Ha
Cheers for that. Laugh? I could of shat myself.
(square go, Mon 12 Apr 2010, 23:15, closed)

Yes, that's a big wind up for me too!!
That, along with their, there and they're. Equally annoying, but at least they only affect written English. Should of, could of, must of, all seem to be emphasised in speech these days. I begin to wonder whether people do it to annoy me as I think I must HAVE developed a nervous twitch when I hear these phrases being said!!

(see also sumfink. Why?! The word doesn't have a K on the end, and never did. The only word that sounds similar is 'think' and it's unrelated. I can accept the inability to pronounce 'th', it's becoming more and more common, but the inability to actually read just pisses me off!!)
( more balanced than jeremy beadle It wasn't me..., Mon 12 Apr 2010, 23:34, closed)

...and I nearly forgot
bought and brought. How hard is it?! Really!!
( more balanced than jeremy beadle It wasn't me..., Mon 12 Apr 2010, 23:59, closed)

I wouldn't of bothered

(TROLLING AWAY living under a post ironic bridge, Tue 13 Apr 2010, 7:37, closed)