It's been brought up before more times than anyone cares to remember, but as it stands the general response was one of two things;
a) yeah I agree, something needs to be done about this
b) you need to realise it's a game and not let it get to you
I'm not picking either option here, no, rather, I'm mixed between the two. It's not right to disregard the problem as a problem (point b), because it is one, but conversely, saying it's a big problem isn't right either, because it's not. Because of the competitive nature which MCSG generates, there will be competitive talk, and not all of it is pretty. It's unavoidable, except if we filter it out. That would be a good idea, but at the same time, another good view and train of thought is for these comments to not get to you/affect you point blank. You need to realise that people who say things like this are trying to get at you, trying to get a reaction. Giving them the reaction is the wrong thing to do- we learnt that when learning how to deal with bullies. Just ignore them, because if you're denying them a response, they're just making themselves look like a bit of a fool.
tl;dr resilience is key here, but this trash talk problem is a problem, one that needs to be addressed if it gets worse