I'm not saying your point is totally invalid, because it isn't, but couldn't you have turned off chat when it started, then turned it on every so often to check if it had stopped? Just a suggestion for the future if you really want to keep playing on a server where chat isn't necessary when people start spamming.
I'm kind of sad to see that Modder was involved since I actually hung out with him for a while until his computer died, but I never really talked to him after he got a new one, fixed his old one, or did whatever he did.
AND WELCOME TO THE JAM