When we were hanging the children's quilts at our guild show last fall, there were several sleeves that were amusing in their form - and completely unusable as there was no way to slide the pole through them. We ended up using lots of safety pins so that they quilts could be hung. I spoke to the girls when we returned the quilts to them, to let them know what we had done - and so that they could improve for the next show.
This is not something I would (or could) do for an adult's quilt. At judging a sleeve problem was caught that hadn't been caught at the take-in, and the quilt was sent home so that it could be fixed and returned the following morning. Obviously, this can't be done at a larger show, especially if it is being sent out.
Cheers, K