In regards to separating or lifting, I don't think it would be possible without removal of this type of bra.
I only wear them for intense exercise, but I wondered how it would affect the screening process. I'm not about wearing it to the airport now that from what I've been reading they will still find a way if they really want to dig in there.
I'm just so sickened by all of this, I have been trying to find a way to make this upcoming flight experience not so horrible, but I don't think it's possible.