I dunno, these same types of palms line Dolores Street for miles, and they're around Union Square, and I've never seen fronds on the roads or much litter. No tourist has been slain by a falling frond in front of Macys. And I thought these palms were chosen specifically bc they came from a windy oceanic place, and they do well on Treasure Island too, and it doesn't get more windy than that. This sounds like a lot of hyped up concern over nothing. They'll be fine.