its not always knives or guns or bombs that are the reasons for patdowns.
some people (OAR fans) decide that they will be bringing their own beer into the show with them, and hide it in their short pockets. while this isnt a safety issue, its about following the rules and the economical interests of the venue.
I understand as much as anyone how annoying this can be, and am constantly disappointed that the idiocy of others time and time again, inconveinces me or takes away my freedoms, but it is something that must be done. the same goes for radar checkpoints on the highway....if you are not speeding, you dont mind them, but if you are never in an accident involving some asswad driving 100mph, you may just have those pesky patrolmen to thank.
in the end, i am only jealous that i do not have as much free time as this guy apparently has.