Guys, let's not flame, discuss this as equals. Please.
This command could cause a few problems:
Players won't adapt to fRO: Newer players starting out won't beable to adjust to the PvP system if they can easily turn it off. If they can't adjust to PK here then they will NOT enjoy it here, without a doubt!
MvPing: When you're hitting MvPs and a random person comes along and starts doing the same natural instinct tells you to fight that person off, no? With this command that's something you wouldn't beable to do... It's not going to help newer players either because there's a good chance the person who came along will hit more damage on the MvP.
Annoyance: Take for instance some person just killed you so you use the command to turn off PvP and warp back to the person who killed you, you then annoy them by persistant use of ygg leaves, using sight, even flaming that person.
These are all possible to happen and probably will. Ontop of that you're wrong when you say fRO isn't a helpful community, just because the majority dislike your suggestion doesn't mean we're not 'helpful'. There's many people and guilds out there willing to help you if you get killed, help give you items, and help show you the basics.