1. Why would they? If they have the ability to get here, they aren't going to learn much from us. Any learning they do would be like us studying ant colonies. Sure, we do it, but it's not a big deal.
What makes you think all civilizations produce identical results and all planets are identical? I think what makes us interesting is arts, music, incredibly complex social interactions and rules, war and peace and reasons for them, languages, races, DNA, fauna and the planet resources itself.
Any intelligent race knows that to study means non-interference. The very moment they announce that we are studying you means you are not the same any more.
Arrogant to think that someone in Harward is more worthy to study and interact with than a farmer in Iowa. There are tons of sightings in largest cities in the world.
You know the answer to that. On Superbowl there are 1000 cameras ready to point in certain direction. Taking a photo of something that passes by needs a camera that is ready to shoot, you looking into that direction and to overcome initial rush of thoughts "what is going on". I saw an unidentified strange device hovering on my way to work few years ago, and only after I lost sight of it I started thinking about getting my cameraphone ready, my two professional cameras and long lenses were at home.
Take a photo of a car accident happening. Those happen every day 1000 times. It's easy to be on the right spot with right equipment and timing, right?
So you say, fine if it makes you feel good.