So, realistically, if we land in a planet with life on it, we're going to figure out whether we're going to eat it, and our criteria will be that it is not more intelligent than something only marginally less capable than us (higher primates, crows, dolphins, elephants, cephalopods, etc) so if they have found us, it's really very likely they're going to rank us on a scale of edibility, without much concern to how superior we think we are to other forms of food.