They probably didn't steal every song, but they plagiarized quite a few. LZ was my favorite band. Then, by chance, I heard one old blues and one folk song with LZ lyrics on a college radio station. Later, other people found other songs. So disappointing...
But, back then, many bands played covers we didn't know were covers, and the Brits loved American blues. It ticked me off that LZ repackaged some old American music and sold it to us as theirs.
But, they put out so much other great music. As for the covers, I got to hear the original artists, who I never would've heard about otherwise. (I hope they eventually were compensated.)
Physical Graffiti gets my vote for LZ's best album.
If you guys ever get elected you can ban the Beach Boys, the Doors, Marvin Gaye, Sly & the Family Stone, Otis Redding, Steely Dan, Jimi Hendrix, Frank Sinatra, John Coltrane, Gene Krupa, Connee Boswell, Hank Williams, Chuck Berry and all those other musicians you say makes you a terrible person to like!
No one fought others to get tickets to a blues show back then and still don't today but the rock and roll versions of blues songs could sell out stadiums.