Re: I've been doing it that way for decades!
I fail to see how taking down a wrong cluster due to faulty labelling would be your fault. Show your bosses the work order, show your bosses the label on the server. And leave it to them to give the Admins a good kicking for not maintaining correct server labelling.
In the long run, putting up with false server labels is going to cost your company a lot more, since eventually someone will do something really terminal to one of those mislabelled servers. And when you get asked if you knew about the mislabelled servers, well I guarantee you'll be joining the line of people getting their asses kicked for not doing something about it.