IC: THUMP and SHUN are about all you have available to your character to deal with this. Thump will shut them up while shun will reduce their abilities to use some commands, I don't remember exactly which ones or if they're significant enough to stop anything.
OOC: REPORT is the ticket here, but if they're logging out so quickly, it'd be hard for a GM to impact them in the immediate sense. I suppose if enough reports came in about the same characters then they could get a lock out on those accounts, but the people playing them would probably just make new accounts and keep doing whatever they're doing.
Other than that, Samsaren's player is right. Ignoring them will at least show that you're not willing to be party to the disturbance or contribute to it in any way.
The Kasto mimic abruptly solidifies, looking very much like Kasto.
>
You say, "What a handsome fellow you are!"
