I hate the way Tasers are being used like this. That said, once a person starts breaking the skin (scratching) she becomes a danger in this era a communicable diseases such as Hepatits and HIV.
The staff should not be expected to risk their health.
Sounds to me like the Tasers are the least of the dangers in this little girl's life. Out on the streets at 2:50AM, drunk, stoned, and spaced on Xanax -- at 13!
I would think if they're close enough to taser, they're close enough to use a 'tranquilizing dart'.