All day, every day, always!
Yes ok, you have already talked about it.
Yes ok, the usual soup.
But you cannot ignore these things, it is your game and it is your responsibility.
How much effort does it take to stop this?
Put someone who checks and as soon as he sees such a thing? account closure. Or it doesn't take that long (I'll help you if you want) to write a few more lines of code that automatically intercepts these messages.
Someone will get tired sooner or later ..