Affirmatively participating in another person's delusion will not cure their mental illness.
You mean we shouldn’t encourage the guy in the mental ward who thinks he is Napoleon? Addressing him as your Imperial Majesty isn’t a good idea?
A lot of people are bored with what used to be considered normal behavior. The boundaries have been stretched to the breaking point - remember Fear Factor? Tolerance levels are challenged daily. It’s becoming easier and more acceptable to participate in the delusion of the mentally deranged - the new normal. We can thank the liberals for poo-poohing a parent’s right to discipline their child, and for making the fear of being called phobic, racist and bigoted more impressive than the fear of God.