obfuscate user data for privacy in WordPress database

obfuscate.sql

UPDATE wp_users AS user
INNER JOIN wp_usermeta AS meta ON meta.user_id = user.ID
SET 
user.user_email = CONCAT(SUBSTRING(MD5(RAND()), -10), "@", SUBSTRING(MD5(RAND()), -10), ".com"),
/** random strings */
user.user_pass = CONCAT("pass_", SUBSTRING(MD5(RAND()), -10)),
user.user_nicename  = CONCAT("nice_", SUBSTRING(MD5(RAND()), -10)),
user.user_login = CONCAT("login_", SUBSTRING(MD5(RAND()), -10)),
user.display_name = CONCAT("display_", SUBSTRING(MD5(RAND()), -10))
/** except our admins */
WHERE meta.meta_key = 'wp_capabilities' AND meta.meta_value NOT LIKE '%administrator%';

DELETE FROM wp_usermeta
WHERE meta_key = 'nickname';

DELETE FROM wp_usermeta
WHERE meta_key = 'first_name';

DELETE FROM wp_usermeta
WHERE meta_key = 'last_name';