One of my co-authors has been banned from reporting any more bugs to Mozilla — for being too darned grumpy.
It’s like they just don’t speak the language of my people any more."
The grumpy person who was banned contributed a lot to Mozilla (for free, on his own time i.e. open source). He didn’t use objectionable language, ridicule or criticize other contributors.
He did submit lots of valid bug reports and had an annoyed, irritated tone in his posts. The site admin banned him. Mozilla’s loss.