So this is how I deal with them from now on :)
Use humour! It works! After I sent this message to the player they stopped. It made my day.
[spoiler]If you just want to be a jerk and tell me to grow up purely because I disagree with the offensive nature and appalling meaning of teabagging then just remain silent. I think it's wrong and you need to respect my perspective.[/spoiler]
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You know by posting this, anyone that recognizes your GT will be sure to bag you, right?