Well, people eat raw oysters all the time and think nothing of it, ball.
I used to eat them as a kid without thinking twice. We'd shuck one open and slurp it down alive (I just recently realized that they're still alive when fresh). I don't think I could do it now.
I went to a fair this summer and saw something really disgusting. There was a stand serving 'oyster shots'. It basically consists of a raw oyster, tobasco sauce, and vodka. The guy running the stand was claiming all kinds of health benefits, but the thought of it alone made me gag.