So from what I have read if your careful you'll be fine eating Mexican food in Cozumel, but be very careful eating Mexican food in Florida.
I actually agree with that.
I've never ever had a problem in Cozumel and I think I have eaten everywhere there.
Your not supposed to take food off the ship, but I'm sure some people do it anyway.
Have a good cruise and don't worry about the food in Cozumel.