Personal drones are once again a hot topic in the media, but this time in a not so favorable light. Recent events, like the drone that landed at the White House and the FAA's proposed rules, have cast drones in a negative light. This latest news might very well sour the taste buds of the public even more. Several drones flying over San Fernando Valley in Los Angeles have been reported to be tracking smartphone and tablet locations. Their purpose? To eventually serve ads to mobile device owners.