You can always make sure you don't schedule your Disney trip in the middle of the summer, if you think any family member might have a problem being out in it for too long. Honestly, I think the sun is more of a problem just walking around the parks than it is waiting in the lines.
And the people that try to save 10 spots on the curb with bags and stuff before the parade starts bug me too. We could start another thread, if you want to chat about that one!
The thing is, many of us could find some excuse or another for not waiting in line. Little Johnny is too young to wait in a long line. It is too hard on little Cindy to stand in line for that long. My dad and I are going to Disney this July, and we already know it will be hot. Dad also will be 70yrs old, so I suppose I could say that he could sit on a bench and then just join me in line later. Seems reasonable. And I suppose most families could say the same about various family members. But what is the point of having lines if so many people can't be bothered to wait in them?
I would hate for Disney to end up so strict on waiting in line, like many other theme parks are. At Cedar Point, you don't leave the line for anything, and there is no cutting at all. There is a 2 hour line, and you leave to use the restroom? Too bad, you start at the end. I think it is nice that Disney lets people leave with their little ones to use the restroom. But if too many people start thinking that they are too special to wait in line, I can see them becoming more strict. And that would be a shame.