Here is an amusing story I like to tell whenever the topic of a discussion switch to DRM.
Not so long ago, a friend of mine, fervent adept of file-sharing, and myself spent quite a lot of time playing medieval total war 2.
When we heard of Empire Total war, we were delighted, and he, for one, decided to buy it.
It is to be understood that he could get pretty much anything, quickly, and with virtually no risk, given that he was quite expert at in matter (I for one, use almost exclusively free software, and only sin a his house.)
He proceed to buy it, and get ... an awful half finished product.
Those who bought that game early on know of what I'm speaking about : he game was littered with bug.
That notwithstanding, installation was an hell, steam did a lot of trouble and the stupid DRM wouldn't let you play if you were not on-line.
Quite cooled with he experience, he later proceed to acquire napoleon total war, in a quite less legal way... and found out it worked way better on his old laptop, than the earlier Empire total war. Dumbfounded, he quicly install a cracked copy of the later and found out that whatever DRM (including steam) that have been removed was such an hurdle that he could experience a net gain in performance.
He then sweard to never buy anything again, and I'm happy with whatever linux distro I choose to install .