It is a very common practice.
My point is that you say "all I care abou is my kids" yet all you are saying is that you don't care about the kids as long as you get a good view it is just as selfish.
You say that if I want my child to have an unobstructed view than I should pay-so that I am out of your way so that you can have an unobstructed view. You are being ridiculous. If you want an unobstructed view boo the dessert party then.
Yes all that matter to me is my kids, its up to other people to look after their own kids, usually in the hub everyone is sitting so I havent had that problem.
But, as I have pointed out once we are behind standing people it is my place to make sure the kids can see, and we were waiting before you if we are in front f you so...yes my kids have more of a right than you because they waited longer.
We do though normally have them on our shoulders already because it is easier than loosing them in the crowd.