I'd say hang on to all of 'em. The history of the HL collectibles 'movement' is contained within those chats just as within forum messages. I've found myself rooting through them now and again. Perhaps no need to have on-line access to them all, but don't throw 'em out. (I know I wished I'd saved more of the AOL chat logs.) It would also be interesting to be able to search the chat logs.

What is the format of the logs? Text?

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/im