I would advise to change every single solitary online username and password. I also stopped keeping contact lists for my hotmail when I was using hotmail (live.com)... I would get virused and next thing I knew, the few people on my contact list were getting spammed by my account.
Good idea. Actually, I’ve been told it’s a good idea to change user names and passwords periodically. I haven’t changed mine in a while, so thank you for the reminder.