YMMV, I've been regularly impressed with the quality of posts on hackaday. I find there are some very knowledgable posters who will often add great value to a given article. That said I may happen to only be interested in the articles that tend to attract higher quality comments, and miss much of the trolling that happens elsewhere on the site.

Indeed, there are quite a few trolls and toxic folks there, some of whom I've seen here as well. There's one guy in particular who trolls any article about the Raspberry Pi, calling it the "Pee" and droning on about how terrible a platform it is even though he owns several of them.

That said, I've seen (and participated in) some great discussions in the comments from time to time, especially the ham radio related ones.