From Sapience:
Due to an increase in the reports of compromised LOTRO accounts and hacked accounts in other games, we strongly encourage all players to change their passwords immediately. To help reduce the likelihood of having your account compromised we suggest players create a different username and password for each site they visit and each game they play. To change your password, please visit http://myaccount.turbine.com
I have only this to say: Muahahahahaaa, you'll never guess my password, suckers! (You might have a chance if you speak Sumerian. But probably not.)