A: An AbuseFilter is a MediaWiki extension used to filter a wikis content.
Q: What is it commonly used for?
A: Often times an AbuseFilter is used to help wikis combat spam and vandalism using custom filters.
Q: What can the AbuseFilter not do?
A: It cannot maintain a wiki by itself nor is it meant to.
Q: Can I play with it?
A: No, you cannot. The AbuseFilter should be used with uttermost caution due to it's ability to easily disrupt the flow of a wiki given untested filters/rules.
Do I Need the AbuseFilter?
Often times the answer to this question is a "no". The AbuseFilter extension is usually only activated if a wiki is in dire need of some sort of filtering mechanism and there are no other options that are more suited to the task. Such tasks usually revolve around stopping or easing the flow of vandalism and spam on a wiki.
If you feel that your wiki could greatly benefit from the use of the AbuseFilter extension then please contact Wikia staff and ask them to enable it on the requested wiki.