Here's the screen recording version of a long exposure (thanks for the nerd snipe) - https://gist.github.com/spro/7599415b0e47de65311557b3454771a...

Perhaps this technique could be defeated by scrolling the background in the opposite direction as the text

That's what I was expecting to see. I didn't have a mount for my phone handy, to try it. The exporting of frames from a video is a good compromise though. nice one