In BBQ, why mod a hint at a racist joke but not an actual racial slur?

[Northern_Piper]

@mordecaiB

I guess I better never mention the old Calgon laundry commercials in the Pit, I’d probably get banned.

It’s acceptable in the Cafe Society, though:

Earliest TV commercial you remember verbatim

“How do you get shirts so clean, Mr. Lee?” “Ancient Chinese secret!” “My husband, some hotshot. Here’s his ancient Chinese secret – Calgon!” [ - YouTube]