A main issue for me with the buffet is eating AFTER using all of the serving utensils that have been used by others with uncertain hand cleanliness. I may know I washed my hands, but I'm not certain of everyone else!
I used to always use the wipes that they had by the drink stations in the buffet to wash up after getting my food and before eating (& also after touching the drink dispenser also), but they had removed these on my recent Wonder cruise. They had also removed the wipes at the outside drink station, but when I mentioned to the hotel officer that I missed them, they appeared back (at least for the rest of the cruise)! I also mentioned that I missed them inside the buffet, but they never returned there so I used my own that I carry with me.