Gosh I hope not. I believe in the right to offend people, as well as the right to be offended. The only reason I agree with punishments for toxicity in game, is because it tilts people and takes focus away from objectives. It destroys morale and your chances of winning.
Here on the boards, there is no win at stake. There's nothing at stake. If he hurt your feelings, just remember he's a stranger online. He has complete anonymity and he'd be toxic to anyone online, so just don't take it personal. We gotta stop the trend of silencing people. I know league is a game, so it's hard to compare it to real life... but it is happening in real life too. Let people offend eachother... if they make an ass of themselves, then that's what they get. That's the natural way of things.. someone says something highly disagreeable and irrational, and they lose friends, respect, and credibility. Don't make some governing force get rid of them. Just shun them and move on. Other people see it and they realize that person is an ass. It's not like everyone's laughing at you, agreeing with said toxicity.