According to Simetrical: "It is now possible for wikis to require a certain number of edits, as well as a certain registration time period, for users to become autoconfirmed. Thus, for instance, accounts that have existed for several weeks but have made fewer than five edits might be prevented from moving pages or so on. If a particular wiki would like this enabled for them, it can file a bug report after community agreement."
I think we should enable this with a threshold of 10 edits. 10 edits is reasonable for a vandal to go through the whole warning system and get blocked, while at the same time not too much so as to discourage new contributors. --Mets501