Ted Rall's comics are rude, extremely politically biased (you're not likely to like most of his stuff if you're a Republican, though the Democrats gets a few bloody noses as well), frequently tasteless, and always politically incorrect.
Are you a victim of age discrimination? is perhaps one of the "safer" one, though still blatantly biased.
Quite a few of his comics - even of the ones where I agree with the main point - are just too tasteless to be funny even for me, who do generally like quite bizarre humour.
Yet I'm still drawn back time after time because I love the fact that he's prepared to be so extremely in your face and brutal about putting his points across, even though it must earn him tons of hate mail...