Could we have a "mute self" option?

Sometimes I have trouble controling my language and I don't want to have to make my teammates spend their time muting me. So what if I could mute myself when I think I'm going to start getting mad and toxic, that way my messages never actually go through so I can vent my heart out if I want but it won't effect anyone except for me standing still.

Sadly, I really need this.