I would not be annoyed if someone did an XCM move wrong. But I'm not that into XCM. The thing is, it wouldn't affect me in any way If I knew I was good at that move and then saw them do it wrong. However, if I saw someone do a magic move wrong, like flash, I would be annoyed by the fact that they just exposed the trick. That's just me. And I try to only give constructive criticism, I still have old videos from when I was a beginner on my computer and when I look back I think, "Man, I thought that I was good?"