I can read the dates on his posts - he's a regular Halley's Comet, this one ;)
Most likley what is known as a "sleeper account" -- an extra account set up long ago for contingency purposes -- so that when the poster gets his regular FReeper account banned for bad behavior, he has an old established account, with a few old posts to make it look real, which he can then start using again, thus not drawing the same scrutiny a new account would immediately following a banning.
The only people who would know to do this would be someone who has been banned multiple times over the years, or a professional troll.