Truth to be told. I never been very active on the forums. But recently my annoyance of stupidity and complete ignorance of some members have drove me out of my higher values (being very respectful and calm). Stupidity is not being able to understand and process facts / data / founded ideas for many different reasons.
With that being said, if calling someone stupid wasn't a bannable offense, stupid people themselves would be the ones who call others stupid all the time out of their feeling of inferiority.