I had the word f****** (with the asterixes) on my bio and I was banned from Xbox live for a week. I would understand if it was 24 hours but a week is a bit steep especially as there are people who break the terms of use far more than I do and some guy from my school has a Gamer Tag 'Batty Driller' (I apologise for younger users reading this as that name is really offensive and rude) yet the letter f with 6 asterixes gets me banned for a week.
I get banned on CT. A lot. Like, it's like they like to ban, kick me, and the like. Yeah, they do. They enjoy it. And for the most silly of things. Like when opinions on desserts differ. That was quite a ways back.
I got banned on CT every night. Usually for grammar mistakes.
I was banned because my little brother hacked my account and went around the site doing stupid stuff. the ban only lasted a week, but it was still annoying. I changed my password and he has been unable to hack it since.
Some time ago I was banned from a site (I can't remember the name). A friend of mine asked me if he could use my account to play some game, I think. I said yes (big mistake) and he did something he shouldn't have done: he cursed a lot. Consequence: my friend was banned from using it again xD