No one wants to come into their fun time and be made to feel like trash because someone is rage tilting. Doesn't matter that it's not "real words", the context and meaning is pretty clear. They're abusing the system to trash you. You can be upset without needing to be a jerk about it. Heaven forbid square expect people to act appropriately and have consequences and repurcussions for their actions and words. The anonymity that people think they have on the internet has led people to realize they can say the most vile things with zero consequences. It's kinda sad that expecting people to just treat each other with the most basic dignity is considered being a "safe" space.
Tbf I think square can be a little harsh sometimes if you believe people are being honest with their reason for getting a ban, but considering the racist, anti-semitic, homophobic, sexist, disgusting, etc things that other people can say in other games and not even get a second look, I'll take squares method.