On disliking flash mobs: I figure that, unless I'm on my way to the Emergency Department, I can afford a few minutes in order for there to be a little more beauty in the world. My personal convenience isn't the only thing that matters.
One person's beauty is another person's reason they got fired for lateness, or just had a much longer commute because they couldn't make their train. I don't think that it's necessary for a flash mob to interfere with people who have placed to go and things to do.
If your schedule is so tight that a 5-10 minute delay will get you fired, then there's something wrong that has nothing to do with a flash mob. Would you get fired if there was an accident on the highway that caused a 5-10 minute delay? Sorry, but the "I could get fired" is a red herring. Nobody's life is so perfectly synchronized that the unexpected, whether a flash mob or a flash flood, doesn't happen.
I think that argument goes either way: it's people whose lives
are well synchronized who are most likely to be able to spare 5-10 minutes to listen to a busker, or watch a hawk hunting in the park, and not mind being delayed by a flash mob. People who are over-scheduled,
or have already run into one unexpected delay, are less likely to have the time to spare.
I try to build in some time for delays, but not an infinite amount, because I don't really want to spend all my free time on train platforms, in the gate areas of airport terminals, and the like. If I have a long delay getting through security, I may not have time to get a sandwich before boarding the plane. That's a risk I'm prepared to take, in part because I need to get through security; I need to get to the airport before doing so; and I very much want a cup of tea and a bite to eat before leaving for the airport. If other things go smoothly, then I have the spare time and can listen to a busker, if I like their performance; if not, I may run down the ramp to the platform and barely get onto the train before it pulls out.
Yes, it's a matter of priorities. I agree that someone else's medical emergency trumps most of the things in my life. Someone else's entertainment preferences don't. It is no more polite for a stranger to say "you can't get to your train until we finish this impromptu performance" than for them to insist that I entertain them with conversation on the train when I would rather read a novel.