I'm still so nervous around black people that I'm scared of doing some microaggression and pushing someone into beating the shit out of me that I act super too nice which is just another fucking microaggression.
Maybe I misread this but I don't think it's fair to say i made it up out of whole cloth. No well adjusted person is going to beat the shit out of someone because of a microaggression. I cannot imagine where this fear would come from unless this person has actually been beaten up or knows someone who has been beaten up.
You may be more familiar with a tax disc, or registration sticker or a tag. The little foil sticker you put in your car to show you've paid your taxes in connection to your car.