I don't find it funny. Most normal people don't... If you can't admit that this is really weird and stupid then we can't have a reasonable discussion.
Clearly Joan has not heard of pop culture movies like Zombieland. Zombieland starred Bill Murray (who is apparently not funny, as he dresses up like a zombie in the movie), got a 90% score of approval on RottenTomatoes, and grossed over a hundred million dollars at the box office (before counting DVD sales and so on). So is Joan saying that she can't have a reasonable discussion with anyone that likes Mill Murray classics like Ghost Busters, dresses up at Halloween, or uses zombies as a funny attention grabber?
As a note, I only found this quote as Sebastian linked to it. I've stopped reading Joan Peterson's word salad. It isn't worth the brain bytes.