It depends on what you're sharing with your pets and when. If we are assuming that the food is safe for your pet to have without accidentally making them really sick like grapes and chocolate can. So I don't mind people sharing their food with pets. The problem comes with the timing. In grade school, I had a friend who liked to share her food with her cats while she was eating. Sometimes she would hand feed them, others she would feed them on the fork she was using, and more often than not she would just let her cats eat straight off the plate. It used to bother me because cats clean themselves with their tongue and drink out of the toilet.
Her older sister though, would feed the cats with scraps after she was done eating. Once she had finished her meal, she'll put her plate on the floor and let the cats clean off the plate before putting it in the sink. For me, that's fine because you don't have to worry about cross contamination or wasted food. So for me, if you are finished with the food and it is safe giving your pet your food is fine. But sharing while you're eating grosses me out. I hate that scene were the kid lets his dog lick off his ice cream cone and then goes back to eating off the same cone.
