I beg to differ. There are several servers out there hosting that have plug-ins for flying and/or moving built objects.
http://meancraft.org/Home_Page.php
http://madrealms.net/minecraft-servers/madrealms-the-skyland-pirates-pvp-airships-skylands
http://www.curse.com/bukkit-plugins/minecraft/autocraft
http://www.youtube.com/watch?v=OZpj1UfCa4E
/me picks back up his two cents and leaves the room.