I think the reason that we are seeing a flurry of these kinds of bills lately is that politicians want to be seen as "doing something" to help their constituents and proposing these kinds of bills represents almost no political risk to them whatsoever - it's seen as low hanging fruit, and something that is expected to greeted with enthusiasm by their conservative voter base. They see other politicians proposing such bills and think that they need to jump on the bandwagon too - after all, we have to protect the children from these perverts!
It's preying on people's ignorance and irrational fears in search of votes.
We are such a small demographic that we are seen as no threat to their careers, and the fact that they would be trampling on our rights just doesn't enter their minds, or if it does they just don't care.
I don't know how we stop it; perhaps some favorable rulings from SCOTUS might help (?)