It is a very well known fact that game accounts do delete from the server automatically after 2 years of not being signed into. So honestly this isn't a problem at all. If people from the 2011-2012 times still have their accounts, they must have recently logged in and still show a bit of interest in the game, and therefore do not need any of these emails going out to them. If they feel they no longer need their game accounts, they can always delete it themselves. Not to mention just the vast amount of player accounts they would have to go through, pull out, and deal with. It would basically just take up a lot of time when something like that isn't even necessary.
Hope this sorta cleared things up.
They can always just go and delete it themselves if it is such an issue. ^^ That is their own choice.