[2022] Jagex, what the heck is chat blocking and why did sending a raid layout in the cc get me muted?

If OP can let me know RSN I'd be happy to check what is going on here. The screenie doesn't look right to me, we use the word 'offence' not 'offense' - we capitalise the 'S' in RuneScape - looks like there might be some auto translation at play. Regardless if I have the account RSN I can see what has happened and obviously fix things if there is an underlying issue.

I think that is part of the clunky translation and the original would have been 'type' for 'kind' and 'mute' for 'chat blocking'

OK OP has reached out - hands up clearly something has gone wrong and it looks like the chat system was trying to deal with the type of spam chat you see from gamblers/phishers etc. In this case the player has done nothing wrong and we've adjusted the system to stop future false positives. I have of course removed the mute and bolted a few days of membership to the account given this is on us (albeit with good intent to stop phishing/gambling).