This is a joint reply even though it is from my account. Shannon is sitting here with me, but she doesn't want to fool with typing

The first thing to realize is that I think trans people are more paranoid than normal. I used to assume that any negative glance or conversation was about me, but Shannon usually would point out that it was something else entirely. Ok, Shannon has told me that I should remove the used to above...
The other thing to remember is that SOME LGBT people have issues with transsexuals (even other Ts). Once when we were visiting the DC area (Alexandria), we were walking down the street and when we came into view of a pair of gay men, they shot me some of the dirtiest looks. Others can tell stories about lesbians that were hostile to them as well. However remember that is only some. We were both welcomed into a local group a few weeks ago by both the L and G members with open arms.
It may not even be that the ones looking at her read her as trans, but it may have just been that she wasn't butch enough or fem enough or for the men perhaps they resented the women being present at all. Unfortunately some LGBT people are just complete ->-bleeped-<-s, just like non-LGBT people.
Instead of focusing on the dirty looks, instead focus on the moments when she was passing or she was being accepted. If she expects to be clocked then she will be (even if it is only because she is acting so nervous and her eyes are darting about).