I too, am amazed at guests behavior when it comes to the buses. What really irks me is to see young, able bodied males sitting in a seat when a woman and/or child is standing. What happened to good old fashioned courtesy? During my recent 8 night stay at the Animal Kingdom Lodge, I sat only twice on the bus because there was always someone standing that should have been seated. Here I am, a 49 year old male, giving up my seat, while loads of older teenage and 20-something males, sat on their fat "you know what's". Parents need to teach their boys (from a young age), how to be polite and to always do the right thing.
Here's a challenge to all the able-bodied young men on the WDWMagic Forums...next time you're on a Disney bus and all the seats fill up (and you're still sitting), try offering your seat to ANY standing woman or young child, or any experienced (my way of saying "older") adult. It will make you a better person in the end, and you might actually feel good about yourself for doing the right thing.
OK....that's the end of my minor rant! AND MOST IMPORTANTLY...yea Disney, for taking care of the "strangler/baby "!