aquielisunari :
People have been banned for that apparently. You can find many instances if you Google Banned from Tom's Hardware. I consider it a good idea to avoid cursing or calling people names.
Generally, being banned for swearing (or other behavior issues) only happens after a long train of repeated occurrences and warnings.
"Dude, don't do that"
"Really. Don't do that"
"OK, we're not telling you again"
"Awright...here's a 3 day ban because we told you multiple times"
a week later..."OK, that's it. Through the door or out the window"
For some people, though...The time between "Dude don't do that" and "Your grandchildren can't come here" is measured in nanoseconds.