We're a "heavy rp server", no?
About time we acted like one. I support this idea and I agree with others that it doesn't go far enough, it should be extended to everyone. People shouldn't be able to gun down five dudes and be out by supper.
There needs to be consequences for your actions and as it stands right now? There isn't any real meaningful consequences, people do IC long stretches everyday and they're only in a couple hours. It'll also help timeline wise for characters/factions because when someone spots one of their members get arrested, they'll actually know they'll be gone a decent chunk of time rather than them being out in a few hours.
It's also immersion breaking arresting someone and seeing them out a few hours later and acting like nothing happened to them.