The gumballs are getting to be a nuisance. In the past, I don't think I've raked them, just mowed over the ones that were in the yard. Probably because the trees are taller now, many more gumballs are falling into the yard. A few years ago, the caretakers of the local nature preserve went through and girdled all the sweetgum trees so they would not be dropping balls on the paths. Maybe that's a good idea.