I dislike profanity for the most part, but it has its place. There are some thoughts which simply cannot be expressed adequately without it. Nevertheless, I find it painful to wade through mounds of casual vulgar language on the Internet, where it is far more ubiquitous than it is even in so-called "real life" (at least in the circles in which I move). And most of the time, the use of profanity adds nothing to its context.
Most people on the Internet who learn of my dislike of profanities, vulgarities, and obscenities usually just dismiss it as prudery or squeamishness on my part. While that evaluation is not entirely untrue, it is an oversimplification -- and more importantly, it is preemptively dismissive, which annoys me. Sensitivity to modes of expression, just like sensitivity to certain odors, varies from one person to another; just because my sensitivities may be slightly different from the norm doesn't mean that they are wrong or invalid. I am surely not the only person on the Internet who feels this way about foul language.
My position also doesn't mean that I automatically condemn all uses of vulgar language; heck, I happen to own George Carlin's Class Clown album (on vinyl!), with the "Seven Words You Can't Say on Television" monologue, and I laugh my tush off listening to it. The fact is that I support and applaud freedom of speech and expression; I just think that vulgar language should be the last resort to express something, rather than the first or most common choice, especially if you want your views to have the appearance of maturity and intelligence. Even if your views are both mature and intelligent already, they might not seem so to the audience if they are laced with words more closely associated with "gangstas" than philosophers.
Think of it this way: If you dress like a bum, you are seen as a bum, even if you're a millionnaire. Similarly, in speech or in writing, the words in which the thoughts are "clothed" can make a lot of difference in how those thoughts are perceived, and a PhD can come across as being no more intellectual than a drunk longshoreman if he expresses himself with the vocabulary of one.
So I would ask that before you post, consider your vocabulary choices -- how they reflect on you and how they might color the perception of the ideas you are presenting. If you still think profanity is the best choice to use in expressing a given thought, then use the freaking profanity. But if other words might serve as well or better, consider using them instead of lazily resorting to the same old overused Anglo Saxon monosyllables.