Removing security will in no way improve anything. At that point you would have antags with free reign over the station, especially robust antags, and constant valid hunting. Security would no longer be security, but science would pick up the slack, as well as cargo. You would have scientists with death chems and memes running around hunting antags, with Cargo ordering weapons and armor to do the same. As it was said, it would become a death match. RP would plummet to all time low, as the whole rule of 'Play the role you chose' is just tossed to the wind.
As it is we fight against valid hunters because security plays a vital roll. They're a department meant to keep peace and detain threats that pop up on a space station owned by a enormous company. Of course there are issues. Newer players don't know space law as in depth as the veterans and the veterans are so robust that the newer ones generally don't keep up with them, or if they try, get left behind because the robust one goes off on their own while dragging a Beepsky in tow. Shitcurity is a common word tossed around when people get salty as shit about how they are treated by a security officer, 9 time out of 10. Most of the times it's because they are a new player in security trying to learn the ropes. But people get so upset over some minutes of their round that I honestly feel their RP level drops. Why would you honestly get that pissed at an officer? If you aren't doing anything wrong just go with it... Like.. What is it honestly doing to you to cooperate and maybe help the guy arresting you learn? I have noticed, at times, people doing something, such as breaking into the gateway. That IS against space law, and when someone arrests that person for doing it they are slapped with the label of Shitcurity. Because OOCly yeah, fuck, it's not that big a deal. But RP wise... Why? It makes sense for them to arrest someone breaking space law.
There's a lot to go on about here, but I don't want to build a wall for people to read. So basically, Security is important. ERT's are only reliable when admins are able to grant them and even then they are filled with the same players that play security some times, and other rolls. Play your role, don't be a greytide and for god fucking sake, if you get arrested don't be the shitter that starts screaming shitcurity because it takes you out of the round for what, 15 minutes? Sometimes being a nice guy when you get arrested will get your time lowered. I should know, I've done it.
God I can go on and on with this, already feel like I got off subject somewhere in there..... >:/