SELECT 'all', count(0) FROM user UNION SELECT '0 edit', count(0) FROM user WHERE user_editcount = 0; all count(0) all 22749 0 edit 22288 All but ~500 out of ~22,000 users on my wiki have never made a single edit. Is there a good way to clean out these junk records? Is there an extension that puts e.g. a captcha on the user register page (not just edit)?