That is an excellent suggestion. As a paying customer, you have
every right to food that is fresh and hot.
On those rare occassions when I do eat at Wendy's (the only fast
food chain, in my opinion, that dispenses semi-palatable fare), I
always ask for the fries to be freshly cooked. This will invariably
delay my order for a couple of minutes, but the fries will be right
out of the fryer and piping hot. Additionally, they are usually
extra generous with the serving size as 'compensation' for making
you wait for your order.