Just to be clear, later today I'll be finishing up deleting members who registered a year or more ago, and who have *never* posted a single message. Anyone who has posted at least one message will never be deleted, because members are linked in the database to the messages they've posted, and deleting the member orphans the messages.
I've just completed the deletion of all members who registered a year or more ago, but never posted any messages.
There are 420 members who registered in the past year but have never posted a message. Periodically, as they pass the 1 year horizon, I will delete them, too.
Be warned that the "Search for Registered Users" function under the "User Info & Permissions" navigation link now has "Check All Delete Boxes" and "Clear All Delete Boxes" links on the search results page. I also added "Registration Date" to the search function.
This is just to let people know that I'm doing this once again, and plan to do it periodically. Members with zero posts who registered a year or more ago, 34 in number today, are being deleted from the database.