> 2) Rollback - this is when you take all of the edits of the last user and
> revert to the revision before those edits. The purpose of this is when there
> is a user that has been committing vandalism you can quickly rollback those
> edits. This is a one step process because it just does the revert and saves
> automatically.
>
> note 1: generally speaking vandalism gets caught quickly and is often the
> most recent or most recent set of edie by a single user i.e. the situation
> that rollback is designed for

Well, not really. Rollback is designed for the rarer use-case of the
persistent vandal who makes a bunch of bad edits to a page. But most
edits that are reverted are first-time test edits/light vandalism of
the clueless newbie variety, which is usually just the one most recent
edit.