The frat did a physical "joke" - they placed an effigy of a woman in obvious distress, in a place where almost everyone on campus would walk by, and indicated that she had been raped and her rape was funny.

If you told me this happened within the last decade or two I would have been very pissed off. At least the frat apologised for it (I can't say the same thing about all the males who sexually harrassed me and threw rape threats at me back when I was a teen, I will be holding that against them amongst other crimes because they don't deserve forgiveness through amnesia especially when they know what is derogatory behaviour at that age). It reminds me of the early 2000s joke:

"How do you teach a girl math?"

Punchline: take away her clothes and makeup and have sex with her.

There's no logical twist, no pun, nothing, it's pretty much what a male bimbo would come up with and laugh and his straight ball sucking friends would laugh along with him because they're so stupid when they come together as a pack. I'm the type of person who laughs at jokes which are black comedy and controversial (e.g. sexist, racist) in nature and I can tell you, that is a type of joke that does not work because the entire context does not gradiate to the punchline (sex is not related to any sort of intellectual pursuit, there's zero relation between the two). The entire thing was just pure stupid sexism. If I reverse the entire thing onto a male, I still wouldn't be laughing and I really would like some misandristic jokes to read.