No, it isn't.
It's not the venue's IP that is being taped. So they should have no say in the matter.
The artist alone has the right to make that call and nobody else. Not Clear Channel, not Apple, NOBODY.
It's not so much the recording of the IP, but insuring audiences are not distracted. To be fair, most venues go by what the act wants.
And Apple isn't trying to make that call - if they were, the phone would sense "live event" and cut itself off, not rely on a system that the venue would have to install and turn on.
However, I'm against this kind of thing just because it could be used elsewhere. For example, I don't think public servants - especially in public - have any right to privacy in how they do their jobs.