A person (with “gender background issues”) who knows (as I’m sure many do) that there is a significant likelihood that most people will care if they knew (when it comes to an intimate relationship), and still keeps silent—well, that doesn’t seem honest. I guess that they have every right to be silent, but I believe most people would not respect that behavior.
Just because it would not occur to a potential partner to ask every possible personal question doesn’t mean that they wouldn’t care if they knew. And if the other party strongly suspects that they’d care, and they keep mum anyway…well…it seems like an honesty issue and a respect issue to me. That’s all I’m saying.
I do agree (after reading Eve’s personal observations on this issue) that it is an obviously touchy situation, and that it is unreasonable to expect that each relationship (or potential relationship) be treated exactly the same. It’s an extremely tough call, obviously.