I have been reading both FtoM and MtoF forums and am amazed at all the similarities between the groups. But I have a question:
Don't you think it is much easier for a FtoM to blend into society than for the MtoF? It goes back to sissy vs tomboy. Label a little girl a "tomboy" and she's just a chip off the old block, daddy's girl. And if she doesn't grow out of it no big deal, she's accepted whether she really blends in or not. The worst outcome is that she is labeled "Butch" or at the very worst a Lesbian. (Interesting though, Lesbianism is more widely accepted than being male-gay).
Conversely if a boy is labeled a "sissy" he's totally screwed! His parents wonder where they went wrong. He takes a beating from the neighborhood boys and a relentless teasing from the neighborhood girls as well because he as broken a cardinal socital rule and is basically ostrasized from day one.
There's a bit of a double standard and sexism here to be sure (i.e. sissies are stepping down by becoming the "weaker sex" and tomboys are stepping up by aspiring to be more masculine). Notice the number of "tough chick" movies out there these days? I believe both sexes are equal in the long run but society doesn't see it that way.
Then there's the issue for MtoF's in "tucking" and in padding the bras to get the right look and get the clothes to fit. Similar to you FtoM's "binding" and "packing." But that just opens the door to more questions and more negative speculation.