George W. Bush used both rider and obscurity to quietly yet forcibly expand NSA's spying operations

"President George W. Bush set the change in motion through a little-noticed line in a 2008 executive order, and the Obama administration has been quietly developing a framework for how to carry it out since taking office in 2009." - NYT

This is an example of resorting to the concept of "rider" and also obscurity, so that the line doesn't get noticed and thus doesn't create a splash in the media, yet continues to hold its significance.