The idea that music influences people is, IMHO, a truth that can not be debated. All music inspires thought; but when music involves lyric, the inspired thoughts are typically confined to the subject matter expounded in the accompanying words -- but the emotional involvement is first derived from the music itself.
If this is true, then there is a grand opportunity for an argumentum ad verecundiam style, fallacious cognitive connection between how one feels about the music and how one feels about the messages put forth in the lyric of that music. A given adolescent (NB: Not limited to adolescents, but more typical within that group), attracted, on an emotional level, to certain music, ends up influenced by the associated lyric-message on an emotional - not logical - level.
A great example is the band Laibach:
This group originated from members of the Laibach political party who advocated an overthrow of the Chechloslovacian government. These individuals recognized the influential power of music and, so, formed a band that extolled the party's beliefs. The idea was that if people liked the music, they would become a voluntarily captive audience to whatever ideas the band bespoke in their lyric.
