Here's an example of making a genuine mistake and asking an innocent question... and then getting slammed for it.
https://news.ycombinator.com/item?id=4654361
I made the error of not knowing much about space shuttles and got my timeline most definitely wrong. For my error, I am currently sitting at -1. Not because I was nasty, but because I was wrong and asked a question. I even prefaced the question with "unless I'm much mistaken"!