As we've mentioned a few times in the past, we'll be doing an account cleanup over the next 24 hours.  For this first batch we'll be focusing on accounts that have not been logged into in the last 4 months (So Feb 1st).  The majority of these are users that have never logged into the site since we did the rebuild in early January.   Going forward we'll probably make it an ongoing task with a 3 month window.