That's very true. *I actually like it sometimes - it depends how
  far it goes. I've had friends in the past who would start
  getting interested in what I'm interested, morphing themselves
  into the me they perceived me to be... and it crossed a bit of a
  line where I began to feel awkward. *I started seeing a
  distorted mirror of myself from their perspective. But in
  general, if I'm eating with someone, and they match their
  fork-to-mouth movements with mine, I just smile quietly to
  myself and enjoy the moment.