I find this list truly fascinating. (Sorry if this is very old news to some people.) The list clearly wasn't paid much credence, as 3 Doors Down's revenge-themed "Duck and Run" was ubiquitous around that time.
Some of the connections to 9/11 are obvious (Bruce Springsteen's "I'm Goin' Down"), others (Louis Armstrong's "What a Wonderful World") not quite as much. But I like the fact that ALL of Rage Against the Machine's songs are inappropriate.