Re: Neighbors and bee frass
I doubt that it is your bees. Most bees will conduct their cleansing flight right after leaving the hive. This allows them to gather much better. If they were parked in your driveway I could see it being an issue (my bee truck gets a dose daily) but they wouldn't be flying a mile across a lake just to poop on your neighbors. I suspect it's someone else's bees or something all together like some kind of a aphids that can make quite a mess.
Life is tough, but it's tougher when you're stupid.” John Wayne