I should say that our kitchen is very cool overnight and first thing in the morning.
I make chilli the day before we are having it and then leave it to "ferment" overnight. I find that it doesnt seem to get such intense flavours if I fridge it. I have been doing this for years and we have never been ill, I cook it through properly first and as I say, the kitchen is always cool.
DH only just realised I do this and is now paranoid we will all die of food poisoning! I wouldnt do it if it was warm in there, but should I fridge it?