I don't make wrong judgements, no. Although I may avoid going to people's houses for meals if they're shocking I'm not good at all at pretending I enjoy something.
I think people's cooking can tell me a lot about a person. My partner is a pretty good cook if I do say so myself and I made a WRONG judgement of him when I went to his house for dinner for the first time. I assumed because he was a bachelor for so long he'd be shocking. But I realised he's very cultured - likes food from all different parts of the world, good wine, healthy etc.
My dad is a bit of a health nutter and I can judge by his cooking that he is a health nutter so to make a judgement on somebody on their cooking, I believe, isn't a bad thing!