those in need of a shower/deodorant, those who think the world revolves only around them...and for quick service dining locations those who stand in the line the whole time and only when the arrive at the CM do they look at the menu to decide what they want.
side note: we once saw a grandma on a scooter lose control on the sidewalks of Main St., she sort of side swiped a trash can and jumped the curb and took out about three guests in the process....it was by far the ugliest thing we have ever seen in WDW. If I see a scooter I just give a very wide berth when possible.