I've had to deal with a lot of spoilers which, if I'm looking for them, I don't really care. On the other hand, I've told many a fan boy and girl to shut the hell up if I'm really deeply interested in something.
On the flip side, as a panelist at a couple conventions, I've also had to toss out quite a few spoiler warnings. I had one person scream at me when I suggested she leave because she didn't want to hear spoilers, because she'd rather spend an hour arguing about character height. In the end, you really can't satisfy everyone.