Maxis' Hang Glider is spawned by the Marina.  As soon as you've built that reward you will have hang gliders all over your city.

Whenever you want to take a snapshot for an upload or for a Mayor's Diary, you'd be certain to get one of those gliders in the middle of the picture.

This mod blocks these hang gliders from appearing.  Whenever you want them to appear again, just remove RJ - Block Maxis Hangglider.dat from your plugins.

There is no installer included,as you will have to decide yourself if you want to use the blocker or not. There is also no readme included.  A brief discussion can be found here though.

Installation: copy/extract the z___BSC parent folder into your plugins. If you extracted the ~Documents folder into your plugins, too, it's highly recommended to keep it, but move it out of the Plugins folder.

Un-Installing: To un-install the files, simply bulldoze every lot from this download in your cities and delete the files from the plugins folder afterwards.