It was not meant as a "refutation", just a helpless and mostly emotional response to the large number of, in my opinion, hopelessly naive comments in this thread.

I know how hard it must be to understand how I feel about this. Try to imagine coming across a forum where in all seriousness people ask about how to colonize the stars and everyone responds with e.g. "Ah, that's easy! I can imagine many ways how to do that. The most probable way is by using wormholes." or "We could just transmit copies of our brains and hope that the alien analog of SETI will collect the data!"

Anyway, I am sorry for the nuisance. I already regretted posting it shortly afterwards. Move along, nothing to see here!