"Guns on the table"

In the course of being interviewed for an article tech fatigue, filmmaker Tiffany Shlain, who will be appearing at the 2007 ideaFestival this September, colorfully describes one rule for lunch time conversation:

Cell phones are valuable, shesaid, but 'when you're at lunch with someone, and they take a call on their cell phone or answer an e-mail, I think it's very rude. It should be like, Guns on the table. You sit down with friends, and everyone should put their cell phones on the table and turn them off.'

I can relate. Point it in a different direction.