If you care about them you treat them the way they present themselves and want to be treated. It's that simple.
Exactly.
Although I think the general public needs to understand more about transexuality in order to avoid complicating things and sharing ignorant viewpoints, and that would mke it easier for them to remember that they, along with everyone else, should be treated as they wnt to be treated, not as if they were some strange, practically unhuman group (not to say anyone here would think that, but some people act like they do IRL). For instance, I think some JWs I know seem to understand transexuality even less than homosexuality (god forbid you mention bisexuality). The word "perverts" abound in such discussions.