This thread has been on the front page for weeks now - and still no SE response.

I guess we know that they just don't care. It would be so easy to add a feature that allows you to set (in character configuration) an option so that you do not get tells or friend requests from anyone below a level of your choosing. With a bit more effort, they could also add a white list to the feature so that people on your friend list, in your FC, etc., are not affected.