It looks like the naming was likely intentional, allegations about Cosby go back to 2004. Although Hannibal Buress didn't start talking about it in his routine until 2014.
Radiolab has a great episode about how this more broad application of the first amendment sort of came about due to Oliver Wendell Holmes changing his mind about what actually constitutes a "clear and present danger" between two Supreme Court cases in 1919.
I appreciate that you broke apart the users into two groups. I imagine Group B is much larger than Group A, and that the Haskell maintainers want to emphasize "if you use accursedUnutterablePerformIO, make sure you are in Group A!".
Most Group A people didn't get there fixing surface level stuff. They got there because there was an insidious defect buried deep that required that deep knowledge to understand or fix.
This article (https://www.nbcdfw.com/news/national-international/chick-fil...) says it is because they include milk and eggs, which doesn't make sense, because while vegans avoid those, vegetarians eat milk and eggs. However, the article also says they don't have any designated area for prep, so your cauliflower may touch chicken or may share a fryer with chicken.
https://abcnews.go.com/Entertainment/bill-cosby-trial-comple...