Submitted this as one of those technology vs fun vs security things. The innocent use of an observation drone near the airport could easily see a drone get 'ingested' by an engine. It's really really hard to appreciate just how much air mass a widebody jet sucks as it goes by.
Given the metallic components, such a strike would have a good chance of damaging the engine which could cost the airline hundreds of thousands of dollars, not to mention put passenger safety at risk.
So look for some rapid rule making in this area and don't be surprised if you're arrested by the FBI if you fly your drone near an airport.