I'd say the solution is pretty simple.

1) In your search note in-game, add in, "I'm not interested in ERP." Feel free to add, "Please do not compliment my character's appearance."
2) If anyone asks you for ERP, report it as harassment since you already made a public note that you're not interested.
3) If you find pictures of your character naked on a Tumblr, report it as harassment/cyber bullying and let SE investigate it.

I think it's fine that you've started a thread to make people aware of the modding, OP, but at the same time, raising awareness is not about making yourself a victim. That just comes off as childish attention-seeking. Raising awareness is about letting people know the facts in an unbiased manner, which you failed to do in your original post. You made it about you, your personal discomfort, your personal experience. I'm sorry you've come to feel violated and paranoid about these mods and the people who use them, but you've done more to harm your intention of raising awareness than I think you realize.

Kudo's for trying to help people out though.