There are3 bands with this name.

Ruckus (Los Angeles, not to be confused with the other Nu‑Metal esque band with the same name) Is a heavy hardcore band. They've got a 7 song EP out called Human Pollution.

The Ruckus was a ska‑punk band out of Herndon, VA.

Also a Swiss metal band that released a full‑length album in 1994 and later morphed into http://www.last.fm/music/Shakra

Also a rapper named Andrew Brown...better known as Ruckus, local in Cass City, Michigan. He unfortunately passed away in 2005 from a car accident. http://www.myspace.com/andrewbtharuckus