Funny thing is, swearing can in a way make me sound a bit smarter, because I don't fuck up my speaking when I swear. I don't look down on people who swear consistently (unless you're randoming adding fuck three times every two sentences, then you sound like a moron); in fact, masterful use of foul language is to be admired! I do, however, not think very highly of chatspeak, but that's just because I can't stand to see improper grammar and spelling.
I should point out that I'm referring to when I actually talk as opposed to when I type. I often don't pronounce words correctly, can't entirely convey what I mean or try to say two different words at once, so anything that can help me speak properly I will employ whenever possible. I tried using chatspeak when I first got a mobile phone, but I died a little inside every time I tried so now I just use whole English.
Though if I typed exactly how I spoke, I would sound far less intelligent. I'm in a habit of conjoining two words more than I should and leaving "g"s off the ends of words. Also I refer to everyone as dude, bro and man, regardless of gender. To think that chatspeak is supposed to be a way of writing messages faster.
I have a strong dislike for chatspeak being used outside of texting and I have a good reason: I review things submitted for publication and sometimes they have chatspeak in them. This is stuff outside of the internet and done formally. And it looks terrible.