They said they would start keeping his door closed. Hopefully that will help.
I was bothered by the attitude of the manager who seemed to believe that my dad and the other man who complained were making the whole thing up. I've never known my dad to be a liar, and neither he nor the other man are all that spaced out that they would imagine this.
Keep a journal. Document everything. If you have a meeting with someone, write a brief one page letter as a followup, summarizing your conversation. The same thing with telephone calls. Start with the facility and work your way up the chain of command. Eventually talk with the people at whatever state agency is responsible for regulating and inspecting nursing homes. It might be worth buying an hour of time with a lawyer, but I doubt you have a lawsuit and certainly not one on contingency. There has to be money damages. Would you spend fifteen or thirty thousand dollars on principle? Just take it step by step through the system. Be dogmatic and be persistent. Don't let people brush you off. It is very common but that doesn't mean it's acceptable.
I'm thinking of talking to a lawyer, but what if it's like that at all of these places?
My Mom is in an assisted living facility and she can lock her apt. door. The help has master keys that work in all doors but the other resident's keys only open theirs. So no, not all are like the one your Dad is in.