They've outlawed garbage disposals in Raleigh, NC (plus, apparently they had already changed the regulations to say that you could only put soap and water down the pipes). Seems people 1) waste water and 2) put too much grease down them. Grease SHOULD NEVER go down a pipe.

Onions and pumpkin parts are particularly bad. Lemon peels are nice - they make the house smell good. Supposedly ice sharpens them too....