Maybe I've just missed it, but I haven't seen a lot of responses here that seem to be obviously motivated by jealousy. I get the feeling that, despite how many of us there are, most of us are working on different things. I mean, there are so many ideas, and potential ideas, I don't feel like I've seen a lot of overlap.
And when I have seen it, I feel like a lot of the comments have been of the "Hey, this is similar to what we're doing, shoot me a message offline and let's talk" variety.
Those are never obvious. Jealousy, unless in a romantic personal context, is never displayed directly. It is hidden behind multiple layers of rationalizations or a barrage of negative comments (jab at small detail, over emphasis of small mistakes for ex.: "Oh you just worked 5 months on this website, well it sucks because you use the wrong serif font").