[I am working on that. I think it'd cause more problems than it solves for people to mysteriously go blind if they look at me when I can't tell they're there - but mechanical bugs and magical divination, I think I can do. In the case of the bugs, I just happen to always be indistinct if that's plausible - image goes grainy, my voice is an indiscernible mumble - and the device outright malfunctions and quits bugging if that wouldn't make sense. Magical spying says I'm a null result, if they're looking for something specific I'm not that - if they're looking for me, I don't exist. This does have the drawback that someone who is already looking for me can tell that something unusual is going on. But we know that there exist natural superpowers - mine and Bridget's - and a reasonably competent magic stalker knows that too. Hmm.]