Do @reelmolesworth or @BPGlobalPR count as unspeakably rude? If not I don't know of any unspeakably rude fictional characters on Twitter. Some of the real people can be pretty filthy though :-)
I was thinking of some of the QC characters. Those two are at least irreverent, but not unspeakable, unless perhaps you have the misfortune to be a BP shareholder.
@TheFuckingQueen (http://www.twitter.com/TheFuckingQueen) and @DianaInHeaven (http://www.twitter.com/DianaInHeaven) can be pretty rude, but amusing as well.
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I actually visit the Twitter page maybe twice a year, though, so I don't follow anyone in the sense of taking note of their posts.
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Much like Livejournal these days. First time I've checked here in a few months.
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