I think the name is definately misleading, and it was probably named this way because the community used it to distiguish the new mod from MTA:SA Race. The scripting system provides unlimited possibilities for gamemodes, not just DM or RPG. With the variety of gamemodes that can be created, it is by far the most open-ended multiplayer game I have ever seen. In fact, you could probably incorporate any multiplayer game out there into MTA:SA DM in one way or another.