It is a stupid, crazy and utterly pointless risk to take. I dont know what figures you want, but there are millions of cases of food poisoning in the uk every every, and hundreds of deaths.
Sure we take risks every day, but there is something extremely seriously wrong with your ability to "weigh up" the risks if you are prepared to risk giving yourself or your children poisoning which at best causes days of severe pain and discomfort, and days lost from education and work, and at worst causes permanent disability or death
There is no reason to take these risks at all. Put your food in the fridge as soon as it has cooled - especially if it is rice, pasta or meat, eat it within 1-2 days, and if you forget to refrigerate it or eat it in time, then throw it away -it isn't complicated, it is basic child care apart from anything else, and deliberately not following basic rules to protect your child from illness, pain, distress, and possibly disability or death is of course a serious safeguarding concern which will be reported.
Of course accidental contamination is still possible, but seriously I despair of the level of ignorance and dangerous behaviour I see on Mumsnet about this issue.
I expect many of the people boasting about feeding their family dangerous food are actually lying to get a response, and would not ever dream of doing anything so stupid, however you don't know who might be reading your posts and genuinely be ignorant enough to think you are being serious and saying this behaviour is safe