How would you feel if, when bringing up a conversation topic over lunch with friends, you repeatedly heard: "oh, don't you remember? we talked about that last year."

In general, it can be very helpful to be pointed out where additional insight can be gained from an earlier thread. But it is probably a rare occurance for an earlier discussion to completely resolve, sign, seal, deliver and close a subject.

So, the next time someone asks: "which frequent flyer program is the best?" or, "should I collect points or miles?" don't be offended. If you don't want to go down that path again, then just don't reply to the message! Just smile and consider how fortunate you are that you have resolved one of the great questions of the ages to your own satisfaction, and go on to the next message.