REO Speedwagon: Defense of Zeppelin's 'Stairway to Heaven' Goes Down in Flames

REO Speedwagon guitarist Dave Amato jumped to the defense of Led Zeppelin, which is being sued for allegedly ripping off "Stairway to Heaven." Problem is ... Dave got schooled by the guy in front of him at LAX.

Our photog asked Dave about the suit by Spirit, which claims it has exclusive right to the guitar lick in the famous song.

Check out the video ... the guy in line, who claims to be a lawyer who specializes in intellectual property, explains why Zeppelin is goin' down.