Is this normal?

[removed -- MS]

This guy @sujonm360, keeps spamming a club I'm in with 18+ content.
What should I do?

Wrong place for this..

He is already banned

he was banned a few minutes ago

This has been handled but normally you would have club admins handle club issues or directly report problems.

https://support.chess.com/en/articles/8562517-how-do-i-report-someone

This club is only for the Public API

Which club

??

Don't mess with everything, sir, PLEASE

It was removed and doesn't need to be listed in any case