One of the triggers for the Peasants' Revolt in England in 1381 was a new poll tax, levied on all adults; and particularly, the fact that the test for adulthood was having pubic hair. This led to the contractors collecting the tax systematically looking up young women's skirts.
It strikes me that one really powerful way to oppose anti #Trans legislation is to ask 'do you want the police looking in your daughters' knickers?'