2)If you are using the game mechanics, I would call it PvPing not RPing 
Although all styles of combat have my respect; just because one challenges another character to a PvP does not distract from the fact that it is Role Play.
It seems to me that the term "RP" has become to mean a subset of what many outside of PS (and some within like me) can easily misunderstand due to the common usage of the term "Role Playing". It appears to me more and more that the two terms are not synonymous. This is unfortunate, as it seems to lead to much misunderstanding on this forum - or at least for me.
So far my character has been involved in combat which included straight storyline, PvP and RP style which used the /roll command with 1d6's to decide success or failure of intended actions. A set number of hits was agreed upon at the outset and initiative rolled. First past the post of hits was the winner and the looser used /suicide to enter the Death Realm.
Although it could use some modifications to reflect character stats, DB of armour, and weapon damage; the RP (using 1d6) combat was the most enjoyable. The flow was slowed to the pace of the individual players which mimics more the traditional style of D&D-ish play; as well as allowed time for comments from the characters involved as well as the small crowd which witnessed the event.
That said, it is my feeling that
all of the above forms of combat are legitimate Role Playing styles. It is just a matter of the preference of the players involved... or at least their agreed choice. Notice the term
Role Playing was used just now instead of RP to avoid any confusion and calls of foul from those that have taken the term RP as their own here on PS. That is not meant as any disrespect for them having done so.
- Nova