Good idea. They might lose some business, but they'll win back customers they lost because of wailing brats and all that goes with it. I once walked out of a restaurant before taking a seat at the table because a woman was openly breast feeding her baby - letting it all hang out right there at her table. I've also seen a diaper change in progress in a restaurant, within a few feet of the nearest table. Then there are those people who go for a night out but don't have a baby sitter, so they turn up at a restaurant around 9pm with a baby in a carry cot, then get upset because people are talking in the restaurant and that might wake the baby. Kids running around, climbing on the furniture etc... It's just not acceptable.