Old Vermin said
"Might I mention a less tractable problem on the same theme; seats that are too cramped?".
Couldn't agree more! I hate to find the seat I've paid good money for is suitable for nobody bigger than a 6 year old. So these days I'm at pains to make sure my seat will be comfortable, particularly for legroom.
My two big gigs last year were Bob Dylan and Mark Knopfler at the Mediolanum Milan, then Carmen at Verona. In both cases the seats were thoroughly hateful - albeit the best available and at a huge price.
Fortunately Dylan's performance was good enough to put up with the discomfort. But after two acts of Carmen I had to find a more comfortable seat, which I did, in one of the bars out in the square. The entertainment was better too.