I don't keep my records long either, but I don't think I being a slacker.

I have noted the "removal of miles" incidents, but I think they are rarities. I keep records until the miles post and then I shred them.

With flying miles posting immediately and credit card miles posting as soon as a cycle ends, the only records I hold are Dining for Miles, which usually post in a month.

Despite the numerous "My Miles Didn't Post" threads, I've never had a problem. I was even able to get my points transferred when I bailed out of the old ClickRewards.