Although MD5 has been proven flawed (it's possible to calculate collissions), it may still take several months to crack a password. If you want to keep your PlaneShift account safe, just do this:
-Proper virusscanner
-Proper anti-spyware
-Proper browser
-Don't click on questionable links/attachments in questionable e-mails.
-Properly secured network (especially when wireless)
-Decent passwords
-Change passwords once in a while
In other words, keep your PC clean and safe.
There is nothing PlaneShift can do further, besides perhaps a "One day consideration time" when deleting characters.