I think it's funny... Not "top of the line" funny, but still it's a good ad.
After all those fart/burp/puke ads online and on YouTube, why do people still feel the need to put their sensitivity hats on all of a sudden and comment "only Microsoft can think of something so gross and vulgar" because it's always cool to hate on Microsoft? "Oooh, I'm deeply offended by M$'s awful awful ways of advertising their pathetic little browser, Firefox FTW!!!" - that's a bigger pukestarter right there... it's a browser, not a social movement.