There are very few things that bother me with food establishments. However, when the barista licks his fingers all throughout making my smoothie, it really puts a.. Bad taste in my mouth.. Pardon the pun. I used to work in the food industry and one general rule I like to pay attention to is general safety and sanitation rules. Don't lick your fingers and then attempt to put my lid on my drink. You could also take the sticker off my apples.. They don't really taste that great with minimal nutritional value.