Also, odds are that someone wouldn't bother logging out and in between two accounts. I'd weight your search against people who commented in between the time th

Also, odds are that someone wouldn't bother logging out and in between two accounts. I'd weight your search against people who commented in between the time that the throwaway account posted. People who commented shortly before the throwaway account are also good candidates, as are people who seem to comment around the same time on other days.