I think transgendered people should be allowed to use the toilet they prefer to use. I do not like the idea of unisex at all though. There have been several cases of women being raped recently in unisex toilets in Europe. Yes this could happen in any location, but as a survivor of sexual assault I really don't relish the idea of making it easier for sexual predators. Trans people choosing the bathroom they feel more comfortable and/or safe in, or else toilets that have a separate locking room for either gender, opening into a public area are the only safe options as far as I can see, until an all too large minority of straight men stop feeling like they have the right to do whatever they want with women's bodies.