I'm the lead of a water ride (kind of like a mini coordinator, I am in charge of just the one ride and the crew. I write the rotations, keep track of all the paperwork, schedule, etc.) Anywho, the SGTs I've encountered so far:
-Guests asking if they are going to get wet while looking at the soaking wet seat! (my response: It's a water ride!)
-Guest attempting to dry off the seat before sitting down. Particularly fun because we have a very limited amount of time in which to send boats before we back up which can then lead to a shut down.
-Guests who rock the boat or put their hands in the water after we have expressly told them not to. We have called security on more than one. It's always fun to hear what they have to say. One group, when asked why they did it, said they were just trying to have fun. (Okay, so the ride you waited for isn't fun enough already?) Anoter group of teenagers were warned multiple times by three different crew members. While standing there with security, they said, "No offense lady, but we only heard the one person say it." To which I said, "So you admit you heard the warning?"
-There were the guests today who went into the basement of our ride while a rather nasty storm was moving in. It didn't help that we were in the middle of a down time due to a power outage and I was trying to get my ride evac'd. The thing is, there are signs all over that clearly say employees only, no guests beyond this point. When I informed them they could not be there, the father said, "I know that, but we came here so we wouldn't die." I told him that if there was a tornado, we would bring them down there, until then, they needed to stay in a guest area. Of couse their kid is freaking out because there is a coffin in the basement.

Speaking of evacs...
I love the guests who pitch royal fits when the ride goes down. 99.9% of the guests are wonderful, but there is always one who is ready to scream at everyone in sight. Because we intentionally ruin their day by making the ride go down.