My T uses a similar strategy with clients. If he has to hospitalize a client for suicide danger, that is the end of their relationship. He said it has cut way down on hospitalizations and suicide attempts. He forms a positive, strong, and therapeutic bond with clients and hopes it can be a reason they choose to stay on this Earth until they are better. If they stick around, he can work with them further and help them get better. He welcomes talk of suicidal ideation as it can help the person relieve the tension and impulse to act. This also helps him assess the danger. I do think he uses contracts with these clients.