If they have been fully cooked all the way through, and do not contain moist fruit, then maybe they could be left out and still be safe - like baked bread - but it is probably better to refrigerate them.
Yes
No.
No. You should not leave turkey unrefrigerated overnight. When you leave food at room temperature, bacteria grow more rapidly. It is safer to keep cooked food in the refrigerator to avoid food poisoning.
No
If you are talking about uncooked ears of corn that were left out of the refrigerator overnight, some of the sugars have probably changed to starches so it won't be so sweet. But it should be OK to cook up and eat. If you are talking about cooked corn that someone forgot to put away, the answer is "No. You should not eat cooked corn left out overnight."
No. Shrimp that has been left out overnight is not OK to eat.
No. Stew left out overnight would not be safe to eat, covered or not - unless where it was left out was as cold as a refrigerator.
No.
if they are raw yes if they have been cooked no
yeah of course it can stupiD!
nope
For food safety purposes, it is best to store it covered in the refrigerator, not left out.
No! Throw it out if it was not refrigerated overnight.