No one should be banned based on word use, but based on context.

There is a word out there that sounds like a racist term but has nothing to do with it:

Niggardly - Someone who is extremely stingy.

https://www.merriam-webster.com/dictionary/niggardly

The only sin this word committed was that it sounds like the bad word.

I believe the N word can be used if we are discussing it and using it as a historical context. It should also be accept as a term of endearment between friends.

As a racist term, then that's a different problem.