Originally posted by JonPB Practically speaking, prohibiting photography doesn't work. There's no way to screen all cameras out, and maintaining customer service while disallowing cell phones doesn't work well.
There are several questions when considering photography rules during performances. Primarily, will flashes bother the artists? If so, security will monitor for flash use and attempt to deter it. Secondarily, will photographs be used as snapshots in memorial (which is great for everybody, because it reminds people of the good times they had and makes them and their friends move likely to return) or will they be using them to make money? You sometimes have to pay for a press pass, and the value of that is diminished when anybody can bring in a large camera. Similarly, will the use of large cameras detract from the enjoyment, or even the safety, of other patrons? Probably, and those with press passes generally know to be polite to patrons, although they climb over each other (and security) like rodents in winter.
The last question is enforcement. Does the bag checker at the door know the difference between cameras? Unlikely. A 5" lens rule makes it easy to enforce, and also addresses the safety issue and, to a lesser extent, the profit issue.
Do note that many performance venues allow snapshots to be taken with compact cameras, but actively monitor for people recording sound or video and will try to stop that.
I do object to the word "discrimination," at least in the performing arts context. Artists make their living by performing, and that is usually protected by copyright. (Whether or not one agrees with intellectual property laws is another topic of discussion.) They make money from people paying to record the performance, including photographically. Yes, there is discrimination in the literal sense, but not the pejorative; artists and venues have the right to decide how best to profit from their activities. And there's a lot more to that decision than how you know you will use your equipment. Ultimately, the policy is a practical one.
As a simple aside, In Prague last summer, I visited the prague castle. They have a no photo rule with a twist. You pay a marginal fee, I think $2 I think it was, for unlimited photo rights through most of the castle.
If you had an option of paying a marginal fee to take pictures for personal use, I would pay the extra.
As for flashes, even with the pass, there was a no flash rule rightly, and you forgot some points with respect to flash, some times in light based shows it can ruin it for everyone because of the flash, second, in some performances it is a distraction to the point of being a safety issue for the performers, as well as the impact on art etc and degradation.
The 5 inch rule is stupid as well, because some camcoders, especially 8mm ones are 10 inches long, are they allowed or not, i think it is a binary decision all or nothing and nothing really means that