I'm going to not allow a homeless vet to use the washroom at the hotel I work at
Don't you want to help? Why wouldn't you let them use the washroom?
I don't want to be nagged later by the manager.
I get your concern, but you shouldn't discriminate against homeless people like that. You should let them use the washroom if they need to.
It's going to be nasty if I let them use my washroom and it might hurt my health.
While you are just trying to follow protocol, I think it's a good idea to talk to management to let this homeless person use the washroom. Don't you think he has gotten enough hardships in his life, and deserve something good for once instead of turning him away?