How to Behave at Mass
The list here is pretty good.
Three things really bother me at Mass - the first is hats. On men. Just because it is fashionable for men to wear hats again (other than ball caps or cowboy hats), one takes them off at Mass, or inside anywhere really, just out of respect. Men don't do that anymore it seems.
The second is gum. How on earth do people receive Communion yet still manage to keep chomping away on their wad of gum? That boggles my mind.
Third is water. I can understand the choir needing a bit of water, particularly during a longer Mass for a special event, but how did people ever live without that regular, every 5 minute sip of water from their purchased water bottle? People have really been sucked in by marketers on this issue. Come on, folks! You can go an hour without regular sips of water. Honestly!
(I'm not mentioning cell phones just because the whole cell phone thing has just gotten stupid. Why do you need one anyway? You're not that important, nor are your converstations. Really!