Frankly, a lot less users would find it CANCEROUS AIDS if the people discussing it could keep the threads used down.
People started hating Geass when its proponents started becoming like Haruhi, Lucky Star, and Gurren Lagann fans in seasons past.
Notice, there wasn't too much complaining back during S1. People would say if they didn't like it, but generally they'd leave people who liked it be.
This is the difference.