Toxicity is totally fine in my eyes as long as you're just joking and having banter. Unless the person who's on the receiving end gets really upset, I don't mind it at all just keep it to a certain level to where it doesn't cross the line too far. We don't support toxicity nor should we honestly do anything about it. Steam has put in measures to enable you to block the player who you don't want to communicate with.
If it gets to a certain point we will have to do something about it...
Nothing else left to discuss here, just ignore, if problem persists then let us know we'll deal with the problems you're having in an appropriate fashion.
At the end of the day, it's the internet, just don't give a shit.