Who's saying that Open Play means PvP? I've spent countless hours in Open and was maybe ganked once, by someone who thought it would be funny just to hit on me while I was trying to bounty hunt at some NavPoint. I got my lesson, cursed at my gullibility and since, as a good, planning commander you always have credits aside for your insurance, I just cut with my losses and went on, and it never happened to me again.
Then again, coming back to my point that Open != PvP, I've met a plethora of players which are either about their own business or would be fine with COOP or just interacting with you peacefully. And that's where I'm going at suggesting that the more players in Open, the better. And that probably Open should add more incentive so more players come into the galaxy to interact with.