account integration is not drm, the most common drm used tend to include stuff like keyloggers, root access or constantly sending your data to a server (hence the internet connection) also I was being general not specific to this circumstance or to any single DRM, just the common ones.
It's cancerous to almost every game that includes it, not "those that try to bypass" because the common bypass methods are either to spoof it so it is sending the data nowhere, collecting false data or just straight remove it. And most drm gets cracked within the first week. much difficulty "only for those who try to bypass it" when the only one that actually end up dealing with it are those that paid for it.
As to your comment on cd keys either that or an algorithmic verification system which can be cracked easy too. Didn't say it was "good" I said it's about as useful as the rest and far less invasive. Right now we don't have a solution to idiots doing bad things, the best we can hope for is balancing "make it harder to do bad things" and "don't punish people doing right things"