The funniest ones were in neighborhoods and apartment complexes. I'm guessing they were reporting their security cameras.
As far as I can tell, those are mostly people sitting at home panning the map around assuming that they can report things for where they are looking as opposed to where they are sitting. I think most new users do that in the first few days of using Waze. Once they see a giant camera icon over their couch, I think they learn
FYI, since we are talking cameras, I'll drop the link to the wiki page on cameras
to help spread the word