There should really be a Poll Thread about this. I'd love to see the numbers for the forum users.
Are the screen separation problems with people who are simply less careful with their gear?
I see people on the train every morning simply throwing their $500 fruit tablets in their bags with little care for their overpriced device. I can't image what the same people would do with something less than half the price!
Just for voting purposes: I have no separation problems.
I've used my N7 with no protection, on the train, every morning for almost a week now.
All that said: Now that I put a proper screen protector on it, I might be slightly less careful