i feel so sorry for the parents,and as a parent myself shudder to think what they are going through..
But i would never ever leave my young child alone in a foreign country in bed whilst i went out for a meal.
I have been on many holidays abroad and one of the first things the holiday reps advise you to do is to rent a safe for your money to be kept in,there is a reason for this.To leave a child that is a million times more precious than money lying on a bed,alone is not responsible behaviour,i can say this as a parent myself.
There is no guarantee that you will be able to protect your child a hundred percent of the time,but you can damm well do your best to minimise the chances of harm.