[diffeomorphism]

Which is very much on purpose to make fun of exactly that. Try some of the other settings in the top right, e.g. the literal hamburger menu.

[WaltPurvis]

In what way does it make fun of it? It's simply an example of it. And with no apparent way to turn it off. (Edit: There is a non-apparent way to turn it off. I still think having irritating visual effects doesn't constitute making fun of irritating visual effects.)

[hn_acc1]

Tried that. Does nothing regarding snowflakes that make article next to unreadable.