...the problem is if you search for a large popular airport, you will get thousands of photos, which will make it very hard to find any useful information...
Yeah, I suspected there would be issues with popular airports. The reason I thought it would be interesting occurs when you notice somebody has submitted a photo from a particular airport, it makes me wonder what else did they see at that airport?
For example, what did else did "Mark Pasqualino" see when he was at "FCM" on "2006-11-22". (FCM is Minneapolis Flying Cloud, only 20 miles away from my home.)
www.landings.com deals with the problem by limiting the search to 100 matches, and also allows you to specify the starting point.