If there are others here at the same time, do not shake their hand Mr. Titor! The same matter cannot occupy the same space.
Video tape yourself and touch the image of your past self face on the monitor.
See, nothing happened.
Is that really an applicable analogy?
I suppose what you are saying is that some paradox fears that are believed to curtail the nature of time travel aren't really relevant. Time travel is in fact far more flexible than we believed it to be. We wrote the rules before we made the journey and we got them wrong?
Yes. Is not watching an old movie a form of time travel that you can watch yet can't influence?
Imagine that nature already has a natural video recorder.
Everything that happened has reflected light and sound that is still traveling out somewhere in space.
Future time travel is like a really advanced encoder / decoder (video camera). Not only can you experience everything in surround sound and view, but you can even project your body there and influence the past.