I haven't been active here as of late. I responded to a question earlier and the lady replied back. When I went to reply on my own opinion it said something to the effect of "replies blocked on this opinion". That's a new one to me. I wasn't blocked, I could reply on a some of the other comments and on others I got the same message. I must say I'm not a fan of the way gag is headed.
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.