So here’s my problem…. It is incredibly valuable to me to be able to search through the lj post history in google reader. If I delete those feeds, then I will no longer be able to do that.

From my end it’s harmless to just leave them be (assuming you don’t constantly post now notices to them or anything), but of course that means Google is going to keep checking those urls. It is unfortunate that google reader doesn’t have some sort of unsubscribe but archive option.

So is it ok for me to leave them, or is there going to be some sort of problem down the road?