I think there's a lot more opportunity for us to feel guilty about this sort of thing than there is for the MTFs, because on those rare occasions when society confers an advantage on female-bodied people it tends to do so loudly and publicly. That, added to the fact that we can go full-time sooner with fewer repercussions, means that we're going to find ourselves in these situations sometimes.
In contrast, the ladies' transition process is such that they might spend years going 'part-time', benefiting economically and socially from male privilege, but being unaware of it because male privilege is handed out much more quietly than free drinks on ladies' night. And I don't think any of us would say that an early-transition trans woman is wrong if she allows herself to be read as male at work or at a job interview, even though the economic benefit of that is a heck of a lot more than a few $8 cocktails.
