The salad bars offer a excellent way to eat healthy if you skip the meat and the other high fat items. The health benefits far out weighs the risks from contamination.
And if you are one of those germaphobes then you may want to give your kitchen a close inspection especially if you bring in raw meat. You can never clean it all up the contamination.
FYI, Your Kitchen Is Probably Dirtier than a Toilet Seat | Food & Wine