Man, UO thinking about it more... reminds me of some fun ass times.
When I first started PKing, I had some bad ass armor, and then wore a death robe over it all. So no one could tell what kind of armor or gear I was wearing.
I had 100 in archery, with my bad ass xbow of bad assery. With spell reflect up, and close to 100 in spell or magic or whatever it was called. We would make macros for our spells, where casting say, energy bolt, which would say Corp Por above your head to make it say something like a healing spell, or summon food or whatever, In Vas Mani. Those are really the only two terms I can remember clearly.
Me and my buddy would run around in dungeons, and steal from people, and that would make you grey to them, rather than blue. Once grey, they could kill you without getting a Murder count on. So people would attack you thinking you were just one of the common thieves, of which there were a SHIT load. Literally bands of people running around carrying nothing at all, except maybe a rune to teleport somewhere, and they would open your bags, steal as much shit as possible then teleport away and drop it in their bank. That was a good living to, but i digress.
We would give just enough incentive for people to attack us, once they attack you, they become grey as well. Then its open season.
Do an energy bolt, which was macro'd to look like a healing spell, then drop the damage on them, kill them off, loot the hell out of their bodies. I remember people used to hide runes and stuff in layers of bags, so it could take a while to sift through all the crap to get to the good stuff hiding in there. Like keys to houses! Or chests within those houses, those were the best finds.
The system was kinda bugged and eventually I became a PKer, where as my name showed as red, I couldn't go into towns or guards would kill me, and anti PK's ran around looking for me all the time. That was some of the scariest moments ever, juking out people chasing you down.
You could never PK too long in one spot, or the horde of anti PKs would show up. Lots of times I could defend myself long enough to get away.
Back then too, it took... 4 or 8 hours of in game time to make a murder go away, and you had no way of getting resurrected if you died while red. I eventually died, and basically had to lay that character to rest forever. Along with his many houses and other loot I had gathered over time.
Man I was a huge dick then, lol.