We recently had our main chat room frozen on the DIY site because we're not that talkative. I'd suggest a feature to allow moderators to explicitly protect chatrooms that would exclude them from these automatic freezing and deletion routines so that discussions appropriate for this forum have a ...
"A room is considered worth retaining if it has more than 15 messages by at least 2 users. ... Rooms worth retaining which are inactive for 14 days will be frozen." source
