I think I have a higher tolerance for varied skill levels, , so perhaps I don't speak up quite as often as others might - but when I have felt the need to actually say something I've never been called out for being an ass or had it tossed back at me in a negative way. Phrasing can make a world of difference when trying to offer suggestions.

I'm not saying those types of people aren't out there, I've just seen far too many chat logs where people think they are giving "advice" in an OK manner, and they just come off like a prat.