I can't contribute the time to read the 400+ comments on your original manners question, however I saw that one of the initial comments referred to using a wheelchair to avoid lines in amusement parks. I'm amazed that we don't see more people doing this. Every time we head to one, one of us breaks out the crutches or an old knee brace and the first place we head is to the wheel-chair rental place. In fact, at most amusement parks, the wheelchairs are free (I can only assume they don't want cripples further injuring themselves on-site). Then you simply head up the exit ramps of each ride and are put on immediately. I would estimate we get about 2-300% more rides than the average line-waiting chimp.
Of course, a few of these times, either myself or one in my party actually has had a real injury, but this is the exception, not the norm. A couple years ago at Disneyland we were actually given priority parking before we even got into the park itself. I actually had injured myself that time, so I didn't feel too bad.
I justify this practice quite easily in my head when I look at the costs of an average day in an amusement park. But, do I need to justify it at all? If people don't actually realize that I am dishonestly cutting in line, does that make it wrong?
Don't answer that.
David C Knowles