Looking at a realistic standpoint, you need to understand that no matter how much you argue with them about it, there will always be players that don't know the rules, don't care about the rules, and players that bend the rules and break rp because they don't care. Coming from experience, I've been rdm'd countless times, and I get sick of it after a while. I joined R & R hoping I wouldn't get it as bad as I would as a civ, but it's the same crap. If it's one thing I've noticed about administration though, it's that they have a simple system here: record, submit, resolve. Often time it's difficult to try to convince moderators and admins to ban someone because of an active Rdm incident because in the end, they need to see proof, and I know they do believe and feel bad for everyone that complains about Rdm, but that's just the way it is. I'm an administrator of a Garry's mod community, I have been for 3 years, and it's the same crap there, record, report, resolve. If I'm unable to enter a game to fix an issue , I can sure as hell add a remote ban from the forums if a report is submitted. It's just like @G.O.A.T. said, they can't just sit there and watch as much as you'd like them to.
And hell, if that doesn't work, you can sure as hell RP your way into handling an rdm'er via APD/TPD requests, or you can take it into your own hands if you know what I mean ( ͡° ͜ʖ ͡°)