We don't want people killing random low level players or bank alts. But the key difference between those and the gold spammers is the character age.
I doubt that a gold spammer ever gets past 1h /played. It would be possible to use not only level but also character age for a mechanism to keep our chat channels clean.

It would be funny to have the anti-rogue npcs cut down gold spammers, or maybe even funnier have yellow level 1 beasts attack them.