One time about a year ago I talked to T about mirroring. It was just how she would hold her head and look at me, and it mirrored my body language. I told her it felt intrusive, like she was trying to reach out across the room to touch me. She said she wasn't doing it consciously; I believed her and now I'm less bothered by it. I would be really bothered if it were being done on purpose. But salesmen etc. Do use the technique on purpose.