I agree.    
It is like popular music concerts that are ruined by the hordes of mongs who stand slack-jawed and drooling, gazing at their iPhone screens as they film it. They detract from the atmosphere and are not "there". God knows why they even bought tickets  - they could see it all on You Tube from the sofa.   
(Edit: Sorry Patrick didn't see your almost identical post above as I was so incensed to write!)