The issue here is, that this all sounds like a lot of work to make essentially minute changes. We already have an opt-in/out system, in your character creation screen. Antags need some advantage over the crew, like secluded locations and hacking of lathes, otherwise security steamrolls them, more than they already do so. The crew monitor is to be checked against the manifest as a basic rule. None of these seem worth the effort you're asking, unless you have the know-how and will to do it yourself.