It's fortunate that time travel is currently unfeasible. Once those negative-matter cylinders start spinning at an appreciable fraction of lightspeed, and wormhole mouths start getting put on ships boosting out at high sublight, it's almost a certainty that aside from killing Hitler, people will use the opportunity for travelling into the past to beat the tar out of their younger selves.
I can relate. I look at some things I did then, watch some home videos I made then (for "remembrance" purposes), and am pained. Everyone's old shame is incarnated in their own past. Take, for example, today's photograph. Would you believe that I lived across the street from the Peterborough Public Library for two years, close enough that I could see it from my bedroom window, and this is the only picture I have of it?
Sometimes, I swear, effects can't precede their causes soon enough.
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