Yes, seven years in sleepy-bye, that one was.
Getting bored with posting and dealing with people like you is common, I get PMs from people who tired of dealing with posting and haven’t posted in many years, yet have extensive posting histories.
A sleeper is someone who doesn’t have a vast posting history yet has an old account that was never used.
Those are the back-up accounts that trolls use, and look at the source this poster used today.