My game was neither UO nor EQ - it was Asheron's Call. It had a hardcore, lawless PvP server. The tales of those who lived on it were truly epic [http://www.schattenkind.com/past-present/history.html]. But - and this is important - the number of players on the PvP server was always very small compared to the populations on any of the eight PvE servers (the balance has changed somewhat in recent years, since the PvP hardcore have stuck with the game while more casual players left). People voted with their wallets. They didn't want to live in a world full of bastards.
I think others have said this well enough that I don't need to belabor it further. I'll just add this; many like to say they want more "freedom" in their MMG, but fewer stick it out when other players with freedom hand them the crap end of the stick.
I'd like to add that UO faced an unenviable choice that I don't believe the article addresses. UO appealed to two very different types of gamer. Under normal circumstances, the two would have never come in contact with one another, but UO was literally the only game in town.
On one hand there were the "bastards" and simulationists who enjoyed the PvP and criminal games. On the other hand were the casuals, socializers, and MUDders who wanted to play The Sims Online before The Sims was a twinkle in Will Wright's eye. They wanted to roleplay, craft, and decorate their houses. They treated the game as a digital Renaissance Faire. Few had much interest in serious fighting, or in having to deal with pickpockets, murderers, and burglars.
In other words, they were sheep. The "bastard" wolves slaughtered them. The sheep started to quit the game, and Origin was left with a fairly clear-cut choice - bet on the wolves and leave things as they were, or bet on the sheep and build a fence to keep the wolves out.
They bet that the sheep would be more reliable and less troublesome customers. Purely from a revenue/numbers perspective, I find it difficult to dispute that judgment. The wolves were fenced off. They could still prey on each other if they wished.
Though the hardcore continue to bemoan Trammel, I submit that it kept UO relevant and profitable for many more years than it would have if Renaissance had never been released.