Sex. Feminism. BDSM. And some very, very naughty words.
Oh god, I am so with you. My own experience with OKCupid was short lived partly for this reason. I remember getting messages from a man whose main technique was making suggestive comments about vegetables, and who couldn't spell "weak". I don't get text speak. Surely it actually takes more brain energy to think yourself and your fingers out of typing normally, and make up bollocks words like "gud" and "wen".
I may very well be a snob, but I feel exactly the same way about someone who spells 'come' (as in to orgasm/ejaculate) 'cum'.
I try not to be a snob about that kind of thing, but I always hear the words in my head when I read, and "u" is always pronounced "oo." I can't make it work.
I'm the same way, except for me it's people who type "to" (or "too") as the number "2".
I have a similar response to people who think that capitalisation abuse is an essential kink for d/sers.
Though it kill my thumbs while texting, I must spell out the words.