There is an important aspect of a website development, which is improving the security of vBulletin forums. A lot of people usually forget to configure the spam options on their website and they suffer a great amount of bot registrations and spamming on their forums.
vBulletin introduce a proper way to fight against spam and it is important to set them per your exact needs. To do so, you need to access the AdminCP area of your website. Then you need to locate the Settings tab and then Spam Settings.
Edit the following options:
When you complete the spam configuration on your website, you can simply click on the Save button at the bottom-right corner of the screen to keep the changes.