The thing about that site is it allows people complete anonymity. The reason it, and other similar sites, so frequently get leaks is because there's a smaller chance of blowback. That's it. It basically has nothing to do with the character of its userbase, what else it hosts, etc.
Also people really overstate the accuracy of the rumors there, it's a tiny percentage and they only seem "right" after disparate parts are proven.
One thing I will say though is that I'd like people to screencap and crop out the replies, specifically. Those are usually where the vile nonsense lies and most everyone should have access to easy image editing tools. Seeing those "memes" pop up out of the blue on sites like this is just bleh, and I'm sure not clicking through a link to the site.