Not very tasteful but a real threat is one of the bodies jamming the gear extension and causing the aircraft to land minus the nose gear. That is a threat to the aircraft and PAX.
So far the bodies have fallen clear but that does not mean that one in the future won't jam the gear on extension.
It might be worth a visual inspection by a marshaller or even crew prior to departure in suspect areas that no one is contained in the wheel well.
After taxi clearance its unlikely that someone would run across the apron with a tug / marshaller in front who would view proceedings?