The idea that they only use it in "Worst-case scenarios" is part of their propaganda.
I also blogged an entire description of a video freely available on the web, that detailed
Why students praise the judge rotenberg center (that's a link). Just about as soon as I blogged it, they took the video down. That is basically how they condition both students and parents (students through the parents) to not complain and to say good things about the place.
All reports that are actually reliable seem to say they have those things fitted onto all kinds of people, not just severely aggressive or severely self-injurious, and they use them for such minor infractions as giving staff snotty looks or not solving computer problems fast enough or anything else. (This is what would be likely to happen, also, based on the Stanford Prison Experiment and similar things.)
As a person who's been to a lot of psych institutions that used looks to cover the hell that went on inside them ("we'll just paint the walls whenever blood gets on them and fix them the next day after they get broken..."), I was immediately alarmed by the appearance of the decor in the Judge Rotenberg Center which is like... if they spent that much money making it look pretty then it's got to be a hellhole in there, they were hiding something.
Anyway, they use those shocks for everything. It's also alarming to me that people who are the most at risk of being abused, which is to say those with severe problems, are also most at risk of being tortured in the name of treatment. It shouldn't be like that. And a lot of people get shocks even when it's clear that the shocks have no effect other than terrifying the person. One woman got extreme aversives (not shocks but other things) until the day she died, with her death and the reasons for it, themselves, being covered up by the JRC to begin with. All the signs she gave of being severely and life-threateningly ill... she was given aversives for every single sign she had.
It's a bad place.
And as someone who used to have severe self-injury and violence, I really don't like the idea that somehow someone like me would've deserved to be zapped if we were sent there. (I was sent to another "place of last resort," there are places like that all over the country and JRC is not telling the truth when they act like the only one. And I was physically abused at that place in the name of helping me, as well as at the place before it.)
Anyway, these places are horrible, and if we have international laws that would consider this a war crime if done to an enemy during a war, then surely doing this to innocent citizens of our own country (whether it's called "treatment" or not) ought to be pretty evil too?!?
Also, they don't really work even in the scenarios they're touted as "working" in, they just make someone dependent on the shocking device. (And by the way, this is not electroshock, it is electric shock, there's a difference.)