I don't agree with combat logging in open because you consent to PvP the moment you click Open Play.
If you don't want any risk of PvP, play in Solo or join Mobius.
Personally, I think Frontier should have made a separate PvE server, and in that, you can choose to engage in PvP only if both of you consent to it, kind of like Borderlands where you can challenge a squad member to a fight and they can either accept or decline.
Here's another trope for you:
The moment you click on Open, you consent to other players leaving the instance via the menu log out timer.
It really is such a simple concept that I can't figure out why there is such a heavy discussion about it.
You click on Open...
You accept that players can menu log.
And they will.
And that, my friends is entirely by design.
Happy?
Mark H