I got to thinking the other day about how unrealistic duels were, and how despite this they were probably the most entertaining PvP system out of any RPG I've ever played. Now, to me, the only part that's really all that unrealistic about dueling is the fact that you're able to run through each other. Think about it, your run up to your opponent, exchange some blows, back off and then attack again; realistic, right? Also, you run by your opponent, slash as you pass, just as realistic, no?
Now, I figure the main reason there is no collision detection on PC's is that 'bumping' is hard to code, and players would block areas for the sake of it. The way I see it there are two viable solutions to the problem.
1) Enable collison detection for characters you have targeted. (I think it was Nilaya that suggested this when I was thinking outloud)
2) Have a /ghost command, which would disable collision detection, but also make it impossible to do anything but walk around. So while the majority of the time you'd run into people like walls, if a group decided to block off an area you could simply /ghost on, walk through, and then /ghost off to go back to playing.
So, er, discuss and such