What supreme court decision do I disagree with?

What supreme court decision do I disagree with?

While watching an older recorded news program, I was reminded of a question asked of a congressional hopeful: What Supreme Court decision do you disagree with? That person didn't have an answer right then, but said that they'd have something tomorrow.

So what do I disagree with? Well, that's a bit of a toughie. I don't know the exact citation.

But somewhere, in our history, is a Supreme Court decision that says that not only are the decisions of one specific case valid for that one case, but also that the opinions of the one judge that wrote up the case are in fact just as valid in all cases.