Hey waddya know, I opened this to talk about Gemstone as well.
Specifically, www.play.net/gs4 Gemstone IV the new incarnation, although I played it several years ago as Gemstone III (no longer available). Still pretty much the same thing.
It’s text-based, but DEEP. You can do things with a well-written paragraph that simply can’t be done with graphics, no matter how many polygons-per-second you’re drawing. Gemstone is fun.
Anyway, the anser to the OP’s question “What’s to stop you from going out and killing anybody and everybody you meet?” is simply this…
…other players.
And the gamehosts, people who work behind the scenes to keep an eye on things.
Technically the game allows you to play this kind of character, assuming the people you’re killing don’t mind too much. This way you can make an ‘evil’ character, or have duels, or whatever, and the powers that be {PTBs or “Gods”} won’t interfere.
But there are at least 200 people active at any given time, and MOST of them aren’t too keen on mass-murderers.
If you start running around killing people, OTHER people are going to hear about it. And they will have MUCH better stuff than you have.
Do this often enough and you’ll become famous. There will be folks actively hunting you down the minute you start playing, just to stop you.
Do it in town and there are systems for automatic fines and incarceration.
Do it enough to the wrong people, who do NOT want to play that way, and the PTBs will revoke your account.
End result is a fairly stable gameworld, in which you can pretty much do your thing in complete safety, if you wish. OR you can go out and be a mugger, if you wish… but do it within the rules, or you will be removed from the game.
At the moment, there is a relatively new character that I’ve seen running around a lot. Showed up a couple months ago, played more or less quietly until his character was pretty tough, then started picking fights.
Within a week or two, there was a good chance that if he showed up, there was another character hiding in the shadows, just waiting for him to make a wrong move, then BOOM instant revenge.
As of last time I saw him, there were FIVE people waiting for him. And he was running away.
As long as there are video games, there will be snerts.