IF this is a piracy thing, I fear they've failed again.
If the numbers are even close, they've just chosen to eliminate 40% of their buying customers (those without a reliable net connection), to stop a mystery number of maybe customers who might be stopped from possibly getting it for free by pirating it, perhaps.
I'm sure I'll be corrected, but when was cutting off supply to actual customers a good move, even if it stops possible, potential piracy?
At the same time, the vast amount of gamers WILL be playing online, multiplayer.
IMO, the better option would have been release the game dirt cheap, then charge for an online pass (not like WOW, but a one off charge.)
That way it negates the need for a demo, as people can try the game cheaply, but then decide if they want to invest in the full, online game.