Since this is the site for silly stories, here's a silly story about one of my favorite PvP moments in a non-PvP game*.
I was trying to grind some levels in Everquest with a pick-up group (back then, they were pretty much all PUGs). The guy who was going out to find a monster to pull to the group was really bad at it and kept making trains.
The first thing you should know about EQ is that it was before monsters in MMOs had leashes. They would just follow you forever unless you left the zone completely. So a "train" is what happened when someone ended up getting aggro from one too many mobs and, as they ran to zone, kept picking up more and more. If you saw someone shout "train!" in the zone chat you knew you needed to book it or find a really good place to hide until the monsters eventually wandered back to where they came from.
The other people in the zone were, rightly, pretty mad at the guy in my party, but he was being a jerk about it, laughing, not caring about the other players who were getting hit with XP penalties for dying. He tossed insults back at anyone that suggested maybe he should be more careful, even those of us in the same party.
Our party was, thankfully, camped up against the far wall so any time this guy screwed up and ran to zone, he was pulling everything in the opposite direction from us. We were basically safe from his shenanigans other than having to sit around and wait for things to reset every time. That meant I eventually realized I had plenty of opportunity to do something about this guy.
I told the group that I'd run out of potions so I was going to go grab some more from my bank. I played a druid, so I bound myself to the party location, cast a speed buff on myself, and ran back to the nearest town. I should note this is a little bit backwards. Normally people would bind themselves in town, teleport themselves there when needed, and then run back to the hunting area, because it's a lot safer that way. But I needed to be able to teleport instantly back because I knew what I was actually picking up was going to be heavy.
See, the second thing you should know about EQ is that money had weight. You had to actually manage your currency in copper, silver, gold, and platinum coins. I did go to my bank but not for potions. Instead I grabbed a thousand copper coins, which immediately encumbered me, slowing me down even with the speed buff on me. And then, because I was bound at the party spot, I just teleported back and waited for the next pull.
And this brings us to the third thing to know about EQ: the split command. EQ didn't have any kind of sophisticated way to automatically distribute loot. You were basically just expected to be honest when you looted a monster. And if you found money, the way to distribute it equally was to type something like "/split silver 30", which would then take 30 silver from your inventory and evenly divided between the rest of the party members. Or, and this is the most important part, you could instead type something like "/split copper 0/1000/0/0" and it would distribute the money exactly as specified to each party member.
And that's what I did as soon as I knew that guy had a couple monsters on his tail. Everyone in the party got the notice when I used split, even if they didn't get anything from it. The guy getting people killed was gloriously flabbergasted as he found himself unable to escape, and the rest of the party laughed their heads off. I thanked everyone for their time, left the group, and sped off into the sunset.
*Everquest did have PvP servers but I didn't play on one.