Heh.
So, before my show, I actually read my ticket, and like the robotic sheep that I am, I assumed they actually would be checking people for cameras. Now, I'm sure this is different from venue to venue, but I have yet to see shows that weren't videoed and/or photoed, and they obviously weren't done with cell phones.
Anyway, the one consolation is that a) other people have been taking better pictures than I would have gotten anyway, and b) I didn't have to spend any of the concert holding my arms up and looking through a viewfinder.
So, no advice here, since apparently I'm a wuss who follows the authorities' directions.