The following video shows that if you try and add the one and only Hideo Kojima as a friend via PSN, the ID is instantly transformed into Old Snake. Could this be Kojima's real account, or just a bit of fun?
To quote from runandgun: He's denied me like 20 times in 6 months.
It takes anywhere from hours to days to get denied... also I've seen a short video of a guy being accepted by Old Snake and the account playing Lost Planet. So it is most likely not a bot and instead someone's genuine account.
Video is below, courtesy of GameTrailers:
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