Lately, I'm seeing a pattern from people getting suspended/banned. It all comes down to people being unable to control themselves typing rage into the chat box.
I honestly don't understand how hard it is to just not type rage in the chat box. It isn't like you lose all sense of physical control and your hands press enter, type rage message and press enter again. Besides, rage only lowers the morale of your own team. It has no positive effect on anyone.

Lately? This has been going on forever. People rage and are *******s, get banned, whine on the forums about how they spent a lot of time and money on the game and didn't deserve it (despite the fact that they did). Repeat.

One guy even went to Riot to beg and had the cops called on him.

There's even a loser right now whining about a ban, its on the front page I think.