The Mandela Effect isn't used to describe coping mechanisms around the faulty recollection of an individual; rather it categorises a systemic and widespread incidence of false collective memories.
There's no satirical or arrogant component inherent in this phenomenon. For example, pick any five people at random in your life and ask them if they remember any of the following iconic lines:
* Snow White "Mirror, mirror on the wall, who's the fairest of them all?" * ST:TOS "Beam me up, Scotty" * Star Wars "Luke, I am your Father" * Wizard of Oz "Fly my pretties, fly" * Casablanca "Play it again, Sam."
I've done about 50-100 of these 5x5 samples in casual groups/workshops and have never had a single all-negative response. Problem is, none of the lines above were ever said.
The Mandela Effect itself is not meant to be humorous, no, but inevitably a non-zero number of participants are involved for humorous reasons.