I'm an Open player and it doesn't feel unfair to me, I think you are confusing your own opinion with what you expect others to feel. People should be able to play the game as they want, not as you expect they should.
Well, alright then. Let's create a scenario here as an example of what might happen in the finished game:
You're a bounty hunter and you spot another player in supercruise who has a bounty on him. You decide to run him down to force an interdiction (which might be in the finished game). However, he just makes it to the station and docks quickly. But, instead of trying to make a break for it in open and take his chances with you, he cops-out by going onto online solo and leaves the station that way. You don't feel that's unfair?
Anyway, the structure of the game, when released, should negate the effects of griefers. There is the problem of the station campers, but I wouldn't be surprised if that was sorted out by increasing NPC security around stations. Also, thankfully, there won't be a guild or corporate structure, which really would cause problems!
We must also remember that the final game will, potentially, have over 400 billion systems in it. Enough for any player to get themselves lost in and never see another player for months on end. Yes, there is the remote possibility that you'll encounter another player as you go on your way as an explorer. But that's all it will be, remote.
And besides, wouldn't the hint of that make the game a little more exiting for you all?