This is a dumb idea.
If you let someone interrupt my play-time by putting me in "Jail"... I will be cancelling my subscription.
*Obtains Venerach by the votes of X carebears*
*Proceeds to jail every PvPer who gets reported as someone who kills them a lot in any sort of setting.*
*Every PvPer quits because they can't OWPvP or do BGs or w/e the limitations of Jails impose*
*Back to having a PvE server with a PvP title slapped on it.*
Mission Successful.
This "jail system idea" and others like it have no place on a PvP server. Let the players decide how to handle griefing or whatever amongst themselves.
It is actually very simple. If a player griefs myself, my clanmates, or allies we will war the clan said greifer is in or the individual himself if he is not in a clan. If the individual is in a clan that is stronger than my clan and we continuely get our [filtered] handed to us trying to deal with it ourselves then it is the leader of my clan's responsibility to engage in politics. He/she will seek allies (which in this case should be fairly easy as if a clan/individual is greifing you chances are they are greifing others as well) and you then jointly go after said clan/individual.
Other than the PvPing itself this is WHY I want to play a PvP server. The drama, the politics, the making of friends and enemies,etc.
This is PvP 101 not rocket science.