I know I'm late but just wanted to comment anyway, if the QA is anonymous and blocks the opinion owner or if the opinion owner blocks an anonymous QA, then it blocks ALL comments for that particular opinion. So you aren't blocked yourself, it's just that no one can comment on that opinion anymore.
When it happened to me, the anonymous asker was blocking me (the opinion owner) because she was having a hissy fit. She did this to a bunch of other people who didn't agree with her, and was largely extremely immature.
That's my question, the banana girl was getting all upset because she didn't like the question and seemed to think that was enough to have it removed. I blocked her as all she was doing was making noise and adding nothing. It meant no one could comment on her opinion.