How would The Joker react if he met people that were fans of his work or told him that they liked him and respected what he was doing because they heard about him on TV and in the newspapers?
Assuming that The Joker and not Arthur Fleck the little wannabe with a sob story, the Heath Ledger version or worse ever was going around causing chaos and some people recognized him and tried to approach him to thank him for his cause and beliefs thinking that he might take selfies with them or sign autographs or let him hang around him as fags like a celebrity you want to meet.
How would The Joker react to his public and fans that wanted to meet him or tried to help his cause? That could be hilarious or a disaster.