Based on the abstract of a research paper I found (the only source I found not interested in exaggerating things for clicks or commenting on mundane problems like nests and poop), crows know that dropping rocks is fun. The researchers (again, according to the abstract–the meat is behind a paywall, as usual) speak as if crows are always dropping rocks; the implication being that the presence of the solar panels is happenstance. Their research merely correlates cracks in the panels, and pebbles on the panels, with crows flying overhead. In the paragraph they don’t even directly blame the cracked panels on the rocks, let alone the crows. They simply state the chain of events as a possibility.

On the other hand, I’ve heard lots of fun facts about birds over the years and the underlying theme is that birds are bastardly and some, like crows, are intelligent. What human kid doesn’t enjoy throwing rocks or shooting bullets at glass? I don’t find it hard to believe that crows might similar mayhem enjoyable.