It's not worth it
I got a 14 day ban yesterday for saying things like "kys" to a friend of mine because I was unable to voice comm at that moment; and due to the fact that we lost the game, players on our team reported me for offensive language probably out of frustration. My friend obviously was shocked because he knew that I didn't mean any of the words I said towards him but the fact that I said them in chat, in game, caused me to have that ban (even if it's my first ban, I got a 14 day ban). It doesn't matter the situation of the game, or how you're feeling, even if it's just your friend you're fooling around with, people will find a reason to report you to get you banned out of frustration, anger, etc so don't give them that reason; always be positive and try your best to keep your emotions out of the game chat even if it's just towards your friends.