Bot attacks & player bans

[HolyGrail]

So you have posted on the game that your servers were disrupted by bot accounts and freezing players out the game. So what happens to the accounts that you ban? What is to stop the players from just creating new accounts and starting up again?
What happens to players castles, forts, cities when banned? Are they left as they were? Or are they all turned to free castles, free forts?