Since orbits and transits are predictable, what is the difficulty of using a shutter to prevent accidental exposure?
With prosumer telescopes, images are stacked from dozens, if not hundreds of relatively short exposures - it's trivial to discard the images which were photobombed by a satellite.
I feel sorry and I understand the feeling, but if we are to be a space faring civilization (and we really should), there will be lots of things flying in LEO all the time, and many of those much bigger - and brighter - than these. Companies can try to mitigate that somehow (flat surfaces, materials with less diffuse reflections etc...) but we'd better be prepared for that.
I can't wait to see IR observatories in the lunar poles, radiotelescopes on the far side, and visible-light ones anywhere else, where astronomers could live nearby and maintain their structures. And, with 1/6 of Earth's gravity, it'll be easier to build larger reflectors.