User blog comment:IvyLover/How to give users infinite blocks./@comment-452-20141013015032/@comment-303594-20141015062624

"5 range blocks and 1 single IP block targeting that vandal are set to "anon only", meaning that he is free to create an account from those blocked IP ranges at any time, but hasn't.

The vandal has been effectively prevented from editing, while others from the blocked ranges can still sign up and edit.

While it is likely most people would agree with an infinite block restricting account creation and existing accounts from those ranges - this has proven unnecessary, and therefore it would have been irresponsible for me to do that without cause.

Due to this evidence, I will likely uncheck those boxes when blocking IPs in future."

Whilst in this case not ticking that box worked, in most cases on Wikia (and I've seen a lot) - not ticking to block accounts under an IP causes a disaster where people continue to create socks on other wikis and then evade the block on that wiki witout penalty - as no autoblock will be applied when the account is banned (an IP block already exists, but does nothing).

Furthermore, it's really unclear how the users are evading the block - as you need to use checkuser to see that data.