Not to mention that no matter how unobtrusive it is, you're still essentially renting software and you don't actually own anything. Valve can remove your games at any time, as witnessed by the Orange Box fiasco where legitimate purchases were retroactively disabled, in some cases months after their purchase.
CD Projekt RED has it right, and their GoG.com is the only example of digital distribution done right. Among other things, with GoG you actually own your games, unlike other online distribution (including Steam) where you just rent them.
Very few retailers/distributors sell software. Rather, they sell software licenses. Thus, one does not "rent" a game, but rather pays for a single person paid up license to it. If you don't believe me, read the end user license agreement (EULA) that comes with just about every piece of software. If you don't like the terms, don't buy a license.
GOG is a nice service, no question. But the reason it sells DRM free software is because it is selling games that have comparatively low commercial value (primarily due to age) than a brand new off the shelf game. I'm also willing to bet that they have proven that their business model allows for developers to milk more revenue off of an old product, where the developer likely has recouped its investment and every new sale (with DRM or not) leads to pure profit.
In the case of a newly released game, the economics for the developer are quite different. At release, many developers have spent millions if not tens or even hundreds of millions of dollars to produce a game. Therefore when the game is released, every single sale is important. Indeed, developers of newly released games need every sale to "count," because each one puts a little dent in recouping the massive investment they have put into developing the game. That is why piracy irks developers to no end, and why many of them feel DRM is necessary, at least at the outset. Even if it doesn't prevent all piracy, it surely prevents some of it.
Lets put it another way. Say you run a business in which you manufacture custom motorcycles. So that you have something to show potential customers, you build ten custom bikes, at a cost of $10,000 each. So, before you have a single sale, you are $100,000 in the hole, simply so you can show product to customers. You open your business and start to sell bikes. Everyone loves them, and your bikes get a reputation for being great. Then a stranger comes in off the street sits on one of the bikes in the showroom, and drives off. You never see the bike again. Your $10,000 investment of time and money in that bike is gone. And the person who stole it gets to enjoy it for nothing.
That ain't right, is it? Of course not! And I doubt anyone who pirates software would think so either. Funny thing is, software pirates are doing the exact same thing that the person who took the bike did, i.e.,
stealing product. Yet somehow they feel justified because the developer "deserved" it, or the product cost more than they though it was worth.
Returning to the hypothetical. After the bike theft, you are pretty pissed, particularly because as a business owner, you don't have the luxury of giving away $10,000 bikes when you are $100,000 in the hole. You decide to install a fancy anti theft system on all new bikes. The anti theft system uses biometric authentication to verify a rider's identity with a remote server prior to freeing the ignition. Consumers complain a little about the system, but sales are very strong and no bikes are being stolen.
Question, is what you did as a business owner to protect your product "wrong" or "bad?"