Mass Effect for PC: Why do people hate DRM?

GameCritics.com has conjured up an article that defends the copy protection tactics used by video game publishers and developers, including requiring periodic activations as was going to be the case for Mass Effect PC.
Does DRM really inconvenience legit gamers while utterly failing to combat piracy? Sometimes, yes, it has. But as long as piracy remains rampant, developers have every right to try to protect their software as best they can. Online authentication is perhaps the most promising form of piracy protection, and it's likely that more and more developers will use it, particularly as PC games move from the retail shelf to digital distribution.

Futhermore, I always have to cast a skeptical eye at those who claim that copy protection such as SecuROM causes bugs and glitches, because in the two and a half years that I've been a PC-only gamer, of all the 30 or so games I own, not a single one has caused me any problems at all due to copy protection. While it's not impossible that some users have legitimate problems, I feel that it's more probable that copy protection is often erroneously blamed other system issues.