This is not how I meant to come across at all. I agree with most everyone on here. I think that someone holding a place for your small party (like a family - define how you will) so that small children can eat, go to the bathroom, sit on a bench, etc and not stand in a 3 hour line is ok. Like others, I don't feel that this ends up lengthening the line as you likely will take the same time with characters. The problem I would have is with a bunch of adults (or college kids as my example, or any other type of group that fits here) or those who could more easily stand in line going off and doing rides while not having to wait in line and then all want their own pictures.
Elderly parents/grandparents could go sit and then come back in line as well to see their grandchildren interact with the character. There are many people who cannot stand in a long line due to medical issues, medicine they are on, or what not. Some younger folk may just have a bad case of plantar fasciitis right before their trip. Wouldn't expect them to miss Jack Sparrow as a result! And small children get especially unruly when they are bored. I don't fault these people for not being able to stand in a line and yet still want to see a character. Those that can do the line should. Those that can't, let's give them grace. Those who take advantage, tell them no. That's all.