If you’re worried about that, just say you’re working for their campaign and picking up their signs. I’ve worked on political campaigns in the past and the day after Election Day is spent picking up signs all day. By the looks of it, not every campaign is run that way. There are still a bunch of signs out. Though it is interesting to notice is about 70% the people that lost, 30% the people that won that are still up. Maybe the losers just gave up after the election.