If I was still in I would do everything I could to avoid doing that survey as it could mean retaliation in the future for my answers. I thought the repeal of DADT was already a done deal.
They should fill it out anyway. There will be retaliation anyway.
You make a great point, though, and this should be another battlecry:
No member should be able to be identified by virtue of any answers given on this survey. Asking an age, sex, dob, location, a rank, and an MOS pretty well narrows it down as to who is filling out any given military survey.