I'm an 'activist' insofar that I came out, transitioned, work and live my life as myself in the same area that people have known me for 50 years now, 6+ as 'me'. So people had the chance to see it all first hand.
I don't force an issue. I don't run around with a chip on my shoulder. If people ask and are willing to listen then I'm willing to answer - within reason. Education one person at a time.
If I'm wronged, I gauge the pros and cons about doing something about it. Bathroom issue at work? I stood up for it. Bathroom issue at a private club? I stopped going. If people asked, I told them why.
the only real issue(s) I have with people asking questions is, 1) they saw me as trans (disheartening) or 2) someone told them (pisses me off).
I was asked once if I was always a woman I replied simple, "yes." the fact that I wasn't aware of it for the first 57 years of my life is none of their business.