There's 150000 people registered now, with perhaps 50 more new registrations every day, weekends included. A more plausible number of real registrants would be 1000 people. This make the list so long it takes excessive time to search it, 20 pages at a time. Once the bogus registrar is turned off,
Is it possible to add a column to the users list that stores last time the poster logged in?
Is there a low labor way to erase a class of registrants? The data available now includes number of posts and date registered. Getting rid of all registrants who've been in the system for more that two years, for example, and have never posted, would be a good start. There'd be some innocent victims, but apologies could be sent out.