XenForo includes a suite of tools designed to prevent, combat, and manage spam.
There are several tools that can be used to prevent spammers from registering. These can all be found in the Spam management options.
The StopForumSpam database can be checked. This...
Arguably the most important part of a forum is its user base. XenForo contains a wide range of user management tools in the Users section of the admin control panel.
This section covers the more complex features that relate to users in XenForo.
Custom user fields
From (simple) multiple accounts detection to isp/connection fingerprinting with score-based moderating/rejecting logic. These are very effective low-hanging fruit at reducing spam.
Supports migration configuration from the following XF1 add-ons;
TPU Spam Detect
Alter ego Detector
See the FAQ...
Use Signup abuse detection and blocking instead which bundles this add-on's functionality into a "user registration log"
Makes the spam log prune duration configurable. The default is 30 days to match XF's defaults.
Focuses on permitting to keeping user registration records for much longer...
Spam Clean from DragonByte Tech is a modification designed to add the "Spam clean" tools used in the front-end to the "Batch update users" form in the AdminCP, so you can quickly remove all content posted by users you're banning.
"But DBTech, why would I not just delete these...