Funny topic. I normally am very understanding of incompetence when it comes from nothing more than lack of experience. Happens to all who at one point is a junior dev.
As long as people have the willingess to learn I find myself being very understanding.

I take a lot of effort in helping others, I don't mind at all, and I would rather take them extra 10 mins to explain how to do something than to slap people with rtfm and then blame them completely when their lack of experience messes up stuff. I also take care of providing isolated environments and giving explanations. Even when they screw up, it is isolated from the rest and I can teach them what was wrong, most of the time they figure it out themselves. It has made my coworkers respect me more, rather than being a total dick that believes that what I do is sacred and should be spared from newbs (like all the idiots in S.O) i take the approach of a very patient mentor.

But I am a hippie, shit works for me.

But I do not excuse shitty attitudes and arrogance. I find that not knowing is fine, but acting as if one knows all and then fucking shit up makes it bad.
Which is when I change, I am a hippie but can get violent pretty quickly.

I have been screwed over shitty attitudes more than incompetence.