Board Thread:General Discussion/@comment-5070188-20151202130010/@comment-9605025-20180104213926

You won't get in trouble if you use a personal ad blocker. However, sometimes they cause issues with actual content. Additionally, Wikia does have (at least in the past; I haven't heard of any recent cases) a routine that may detect your ad blocker and prevent you from viewing content until the ad blocker is disabled.

the real issue is when communities try to hide ads for all viewers. That is a policy violation and Wikia is definitely more likely to take action on that.