1) Pirates need an internet connection to download the game...
2) You need an internet connection to register the game...
3) *Neither needs an internet connection to play the game....
4) What's the difference? *You need an internet connection either way.
1) A pirate
without internet could get the game from a different pirate
with internet, so pirates don't need the internet to acquire the game on an individual basis.
2) Bona fide customers must have the net to register/play, yes, but do pirates need it to register? Evidently not as pirated games would have to play sans registration or they wouldn't get pilfered. Only the paying customer is inconvenienced by the additional requirements of this "service"...
3 and 4) Since pirates don't have to register to play, online registration isn't mandatory for them. Only the paying customer needs the net as only legitimate copies require online registration.
...in the case of TES_Ronin, he can go to work and activate the game. Problem solved...
What if it's not a laptop? "Sorry, Boss! >_< I'll get to those TPS reports as soon as I clear some room on my desk, set up my PC, link it to the company's private network, and register my video game. Decrypting should only take about an hour, then there's a patch I have to download

Oh, and I almost forgot, I'll need that WEP key, yeeeaaahhh...". Most who play on PC aren't playing the game on a laptop as most laptops can't hack it and desktops are cheaper to trick out so, in the majority of similar circumstances, http://i2.squidoocdn.com/resize/squidoo_images/250/draft_lens5543742module42442532photo_1248891869carrying_computer.jpg isn't necessarily easily done and exposes one's rig to drops, scratches, dents, or other such accidents. I'd still bet there are bunches of people who are in stuck in that same jam, lugging their hardware right now, some of them cursing at Steam, Beth, Obsidian, or all three every step of the way. Downloading a patch elseweyr and storing it on a USB drive is one thing, but finding internet and toting a rig somewhere, all the while having to depend on someone helping you, is a radscorpion of another color. It just shouldn't be so.