This will be my only OT post here but wanted to tell you about what happened to me.
First off, I once got told to stop using my 70-200 f/4 IS at my son's school play. They didnt mind me using my black lens's though.
This was better. It might sound a bit stupid or mean but last year i was stopped from using my old GS50 at my eldest sons school play. I was only going to shoot my son's scene's but the video guy came over to me and said i had to stop, as it said on the form we filled in that we agreed to him being the only one.thing is, we didnt fill the form in. We even got the head over to confirm it so i said i didnt want my son filmed by anyone. tit for tat maybe but the video guy agreed to let me film any scene my son was in.
Best part was the battery had died during all this and i ended up having to pay for a copy anyway