I'm with that idea, but they'd be in certain places, and I'll probably have at least a minority group of metahumans or the like living in the town, maybe the town is in on the secret? So it's kind of an open secret in the area? Also allowing the teachers to live off campus, and take turns with over night duties?

And I definitely like the task force idea. 

Another idea, townsfolk and task force members are playable characters. However they must be in on the secret or discover it. (Your character will be more likely to be injured or die without abilities of some type though.)