Inactive/spammy Users cleanup

Users that have not logged in to the app for 6 months.

Solution: I ran a query that updated the `display_profile` attribute to `false` for all members that have not been logged in to WSO for 6 months. That took care of the problem partially.

We would probably need a mechanism in place to activate the accounts by confirming the email. There is a module for that in Devise.