Dealing with fake users and spam
When fake users sign up for accounts with the purpose of posting SPAM, it is a good idea to:
-block their accounts rather than deleting them, because a bot will typically try and register under same username and with same email address. Thus blocking, disallows it to happen again. Obviously if the user is blocked, a bot can’t register with the same username and/or same email address. If you delete the account, you are allowing that same bot to register again with the same exact information.
-under user mgmt>user settings, switch to “Only site administrators can create new user accounts”. Handy with websites with small amount of users handling content.
-under user mgmt>access rules a rule can be added to deny particular users/email addresses with the use of wildcards, such as %@metaping.com ,which would deny any user on that domain.
-use captcha type modules.