It seems to me that there are photographers, that started taking pictures of airplanes just for airliners.net. Perhaps they dont even "collect" paperphotos or slides - exclusivly upload them to airliners.net.
Do you think there is a new kind of hobby, which originated from Airliners.net? Are you such a Airliners.net-Spotter? What would happen if Airliners.Net stops existing sometime?