I don't trust them either, but I think that's OK. Just looking at pictures of the food on Yelp is a pretty big thing. But besides that, the comments can tell you things you otherwise might not know, like certain things are only available on some days of the week, or the house specialty is such-and-such, that sort of thing. It's good for facts, skip all the "We found ourselves peckish on a recent gloomy Thursday afternoon..." garbage.