I've experienced a form of hostility in StackOverflow just recently--as in a couple of days ago. On a whim, I visited the website and answered a couple questions, something I'd never done before. I realized it was actually a lot of fun, so I started rapidly answering the all JavaScript questions I could as they were asked. Suddenly a "higher ranking" individual started leaving comments on my answers that I needed to…
I love Stack Overflow, and it's sure a valuable if imperfect resource, but this is something that drives me bonkers about it.
If the question is intelligible enough to receive an answer, and if your answer is potentially helpful to the asker, then it's well-asked as far as I can tell, and the scoring system can take care of its relative utility.
The additional level of moderation doesn't seem to have added much value over my time participating. The closest thing I can think of as nice is combining duplicates, though moderators often seem to miss subtle differences between questions and in some cases information gets lost in the end. Generally, the moderation focus often seems legalistic or driven by artificial incentives rather than primarily focused on improving the breadth, depth, and quality of the site as a technical resource.
Honestly, I'm pretty sure that a significant portion of the hostility people experience is coming from moderation actions.
I might hope the SO team has the intention of going to town on that problem in general, but I don't see it specifically mentioned in today's discussion. I'm sure that if they took it deeply seriously and engaged with enough specific situations where it's been a problem, they could find ways to do better.
I think today's announcement is a really good indication, though, that they're listening to people who are having problems with their SO experience, not just to people who'd congratulate them for their (deserved!) accomplishments and for whom everything is more or less fine.