Are you guys saying that power should be flying left hand patterns and gliders right hand patterns (or vice versa) to the same runway or am I misunderstanding you? In my, admittedly limited, experience I've never seen that. I learned at a sometimes-busy municipal airport and flew there for many years. Everybody, more or less, entered from a 45 at the same altitude. There were rare conflicts with some power guys doing three mile finals, etc. and we had a fair amount of "non-locals" coming in for the cheap fuel but never anything that you could call a near-miss.