I rope dropped Magic Kingdom one time. I was staying at Wilderness Lodge and so rode the boat over to MK and made it to early entry, got to very close to the front of the crowd at the entrance to Fantasyland, and waited. When the rope dropped they announced that Space Mountain, Mine Train, and Peter Pan's Flight were all opening late. I don't recall when those rides opened, but it was well after the normal park opening time. I realize this was an anomaly, but rides opening late happens quite frequently, all things considered.
I will NEVER rope drop again, at least not with the intention of riding something first thing.
