I read a post from an astronomer saying these are aiming devices for the lage telescopes on the islands. He was pissed that peope were sheep enough to jump any bandwagon that pulled up. Just saying, there are a lot of things that could have happened. Occams razor applied to arson would indicate people hand lighting fires. We should look there 1st before hitting scifi level. Look at Greece who have arrested huge numbers of arsonists and stated "we don't have a climate problem, we have an arsonist problem." From that point we can determine motive, which seems pretty obvious. Chasing long shots just let's people overlook the real purps, and that is exactly what they want. They get away with it and get to further label us as wackjobs.