Tonight I got word from at least two people who had their City of Heroes account "closed" today. No idea if this is NCSoft taking action, or accounts being hacked. More to come as it's learned.
Going from what happened to a couple of friends of mine, and this was several months ago, it took a few months to get resolved. This was for a City of Heroes account for one friend, and a Guild Wars/Guild Wars 2 account problem for the other.
Update: Still not sure how those accounts got "closed", but NCSoft Support *is* giving people a lot of trouble getting the accounts restored. They are even suggesting people to "try one of NCSoft's other great games" instead.