Though would it be a good idea to, let's say, instead of permanently blocking newbies with evil score, give them a 14 days restriction to familiarize themselves to the forum? Like every person who registers in an IP address with blue or less evil score will have to wait 14 days to post in the forum.
Here's the way a mass-account abuser would take advantage of the 14-day grace period:
Break rules until evil score starts to increase.
If your new wave of accounts is starting off with a very low evil score, just wait.
Break rules until evil score increases past 14-day grace period, or whatever arbitrary threshold you designate.
It would definitely help Newbies, but think about their position: do you really want to join a forum that locks you away for 14 days when you have no fucking idea what is going on?