Alot of the general public probally don't hop right back on shuttle loops because the second you stop, pop up goes the bar, and I like it when there's lots of riders because I've seen people really freaked out by it, they don't know it's OK. Anyways, had I been on that MR train you're talking about, I would probally have passed out from fear, unsure if we were launching or not!
Anyways, I did a SF park and my first CP experience in the same week, and when people are carrying these things around, basketballs, it slows the loading down, rides that shouldn't have waits have waits because everyone's taking thier time. Like I said before, anyways, the first ride on a coaster at CP and my wife was like "no gates!", I thought it was cool, the employees are always there to put you back should you enter the yellow zone or whatever, it's just those metal steps, like on the Raptor line. Has anybody fallen on that stuff? It was wet while we were there, they were slick to a degree.
