My Mrs regularly leaves food dishes out on the kitchen table, including rice which was cooked the night before. This morning I found a tub of left over KFC.
She, and other family incl. 4 year old, eat it no problem, with no side effects.
When I was at cookery college it was instilled in us not to leave anything at room temperature for more than a couple of hours. I also read that KFC (in UK) dispose of any food not sold within a certain length of time.
How does it work over here?