Publishers may be able to block used games on the PS4?

[starcraft]

Xen said:
Tretton has already clarified that here:
http://www.gamesthirst.com/2013/06/11/jack-tretton-clears-up-confusion-over-ps4-used-game-drm-stance/

"If you buy a used disc from GameStop, you’ll have no problem popping that disc in and playing it from your PlayStation 4. The issue may arise when you try to jump online and play with other players. At that point, a third-party publisher may impose a fee or not allow that."

There's another good link about another Sony exec clarifying, but I forgot his name and can't find it.

Yeah I had seen this one, fair enough.

I wonder why they wont just say that then...particularly in an email response...where its pretty clear what Kotaku are asking...