I agree on the relationship side, it is an abuse of a position of responsibility, but not in the same way as a teacher and pupil, we are all adults here [though we may act otherwise!].
The most I have ever heard of are holding officers 'interracting' with students, and as the last holding officer we had was younger than me, and got involved more as a student than anything else, I dont see that being such a problem.
Again, I don't believe the drinking is a realistic issue. I have been to countless events, and never witnessed anything like the number of incidents that I do when going out in town.
And also, after seeing first hand what goes on in some Officer's Mess' around the country [proper ones now, not our pretend ones] we are rank amatuers.