Oh, and as a side note, if you go to a deli or sandwich bar or such, always ask the attendant to remove their gloves and replace them with new ones. Gloves actually spread more disease than your hands do if they are not changed with every customer, ESPECIALLY if the attendant is also handling money.
Thanks for the info. All reputable comanies that handle food will have a policy on how often the staff must change their gloves (at McDonalds - which isn't exactly reputable lol! - the staff are required to change their gloves at least hourly). I agree though that asking staff to change them anyway is a great idea and totally worth the potential for awkwardness.

P.S.
How much do you hate it when silly people wear gloves but handle money as well as food?