When does a non-profit substance abuse/mental health treatment center need a client signature?

To be safe make sure you have a client signature authorizing you to release any information concerning the client.

Are the police required to inform you of danger, threats, stalkers, conspirators ect. ect. ect. ect. ect,

not that I am aware of, unless they have some sort of department policy that requires it.

I cut my thumb on a shard of metal protruding from my prenatal vitamin. It's minor but I almost swallowed that. Should I sue?

Unless your injury is serious it would likely not be worth your time to sue. Best of luck. And let the manufacturer know.

You need to take him to court for an Order to Show cause. If you prevail, the court will likely award you attorney's fees.