Or... by typing in the conversation "VIRUS.pif" which will auto-kick you outa the conversation.
Anyways, there a script made by NiteMare named "Conversation Warning", I can be bothered looking for it atm (
) just search the Scripts Database for it...
It asks you whether you want to join the Grouped-Conversation or not, but it doesn't auto-close it after some time.
Best regards.