Disclosure

I disclose my cis/trans -status when applicable. I decide when it is applicable. Not anyone else.

That's about it, really.

That's why I will be right pissed at you if you decide for me. I feel inclined to explain myself a bit. Here goes:

1. If I'm doing something trans-unrelated (that is, +90% of my time), it's not only irrelevant, but it also tends to be a major distraction to whatever I'm enjoying at the moment. Well, it's not such a distraction to me, but since good many other (mostly cis) people stop dead in their tracks when trans is mentioned, there's good sense for me in not saying anything about my cis/trans -status. Unless, of course, I want to discuss it endlessly and run in infinite loops around their prospective prejudices, instead of the enjoyable activity of my choice. It's really, really hard to get why I prefer not to disclose, isn't it? ;-)
2. If I'm doing something trans-related, it might be relevant. But unless everyone else puts their cis/trans status on the table, oh, just forget about it. Sure we can discuss my sex and gender, but you go first. There is one exception, however:
3. Which is, when I decide that I want to discuss my experiences of growing up as a trans girl, living the trans woman's life - trans being relevant and something I want to discuss and feel comfortable discussing. This does not happen that often, except maybe in this blog. I've been known to discuss this sometimes.

Just like Cedar wrote, I don't feel educating people is the way to stop cissexist oppression. The way to stop oppression is for oppressors to stop their oppressive actions, and perhaps apologise, too, and make amends. Doesn't have that much to do with education. Doesn't, indeed, have too much to do with me. Oppression isn't that difficult to spot. In fact, whenever you feel a sudden urge to police other people's actions without being able to pinpoint concrete examples (as in not hypothetical, but something that has actually happened) of bad consequences of said actions, there's a fair chance you're about to oppress someone. One doesn't need education to stop this, just chilling out a bit, taking a deep breath and seeing that nothing awful will happen even if you don't engage in said oppression is probably enough.