I’m thinking of meteorites bouncing off of it. Maybe they can put a heatshield in front of the sail.
Imagine the mass of all the shielding, not to mention the effect of things bouncing off if it (deceleration). It would completely destroy the concept of the lightsail. Better to let things pass right through.
With the speeds of objects in space, there would only be impacts.
“Maybe they can put a heatshield in front of the sail”.
Or make a spinnaker out of “Flex Tape”?
A sail such as this one could be made of aluminized mylar—and put into a synchronized solar orbit—limiting any heat-gain on planet Earth.
(That is, if we can agree on what temperature Earth needs to be).