Bias is a built in facet of our human nature, anywhere you find power dynamics you will also find those who abuse their power and a fraction who don't.
Especially when it comes to a game thats over a decade old you can't not expect for people to bend the rules a bit, its a game and people are here to play it like a game, even staff.
This strict code known as the motd is broken almost constantly by both players and staff alike, I see it more as a mutual agreement between all players to keep things both sane and fun for all parties involved, namely rules in regards to rdm and nlr, im a very lax individual and if im perfectly honest I don't give two shits about the rules but I know how to follow them in a way that let's me do what I enjoy on this game, which is to slaughter and inconvenience as many people as physically possible within the rules.
I think rdmers are fun, ill be the first to admit, when a gundealer rdms me after being on the server for a whole two minutes do I report it?
Nah I hunt his ass down.
Hes just another viable kill to me, no one cares if you rdm someone who is massing, that action is one I often take simply because its the more fun of two options but have I ever in my several years of game play been warned for revenge rdm?
Not once.
The rules in any situation whether it be in game or in life are an abstract guide and aren't set in stone.
Some rules simply don't apply in certain situations whether that be because of an individual bias based on morals or a disvaluation of one party based on previous actions, perhaps even something so menial that all parties involved simply overlook it.
You can never expect 100 percent of rules to be upheld 100 percent of the time in any context and that has nothing to do with staff, it is simply encoded in our human condition to be imperfect and develop personal bias and its a social dynamic that is both exploitable and freeing given you apply the requisite stimulus.