It's not a bad topic, just poor choice of words. It should have been a little more specific like "which RPG did you hate the most" or "Buggiest (is that a word?) game I ever played." Even "which is the worst FF title" wouldn't be so bad since it would limit the scope somewhat.
I am curious to see what RPG's people were willing to complete even if they thought they sucked. That might be interesting.