One of my friends told me to try out graal when it looked exactly like zelda a link to the past. I couldn't get it to work the first time, tried again a month later and got in. At first almost no one pk'd. If someone tried everyone would kill them and then there'd be no more fighting. You would get warped somewhere far away and lose your 4th heart and any items you had, so people really did not want to die. It also took a long time to get back across the map.
I met a few pkers and they seemed to be much better at fighting than all the peaceful people. After I was randomly attacked (by MoD members) because they thought I pk'd someone, I got annoyed and decided to make a group for pkers. That was the start of baddies, it was a huge guild with several hundred members, and once a week we'd ask everyone for money or they'd be pk'd and lose all their money. It was fun. I quit graal for a few months and when I came back, most people were kicked out of my guild and the new leaders had changed it into an elite spar guild. After they took away any penalty for dying in graal, there wasn't a point to going back to a pk guild for me so I didn't bother.