I can't speak about Soviet culture at all, but I find it hard to believe that the world's yet produced a culture where the expressed ideals prevent rape. I can just think of so many set ups that I'd think would be in conflict with rape but people find a way to do it anyway.

Re: the intelligence of doing that to a future agent, I imagine that at that point in her career they couldn't really have known that Elizabeth would ever have gone into deep cover. Plenty of people must have flamed out of that program.