Because in many cases, those administrators don't even realize they're breaking the network. They just run a botched config that they inherited from their prede

Because in many cases, those administrators don't even realize they're breaking the network. They just run a botched config that they inherited from their predecessors or something like that. You might say that they're clueless and shouldn't be allowed near networking equipment (and you might even be right) but it's not going to change a thing. For the foreseeable future, working around broken environments is all we can do.