And may be enabled or disabled at will, even in servers hosted by people other than the mutator's author. It sounds like a small change but it's really not. Something like this, for instance, makes much more sense as a mutator than a level script, since it essentially replaces (but enhances) /evilice. You start writing new gamemodes, or replacing external programs like test managers, or just generally giving JJ2+ new options that are actually easier to implement in AS than in C++ because they require client-side participation. It's very exciting.