What is the basis for saying rock music is sinful? It has been suggested to me that some Christians believe that rock music is inherently immoral, and as a result they believe that Christians would do well to avoid the entire genre.

For example, several older Christians have told me that statements about the immorality of rock were more common back in the 60s and 70s. Apparently, American evangelist Bob Larson was against rock music, and that he was lampooned for these view by Larry Norman, a musician who wrote rock music with a gospel theme. If this perspective is widespread, are there denominations that are opposed to rock music? Is there a cross-denominational movement that objects to rock music on the grounds that the genre is in some way unholy? 

I met someone in my previous church who held this view, but I was never able to get a straight answer from her as to why. Was this just a personal perspective, or is this a widespread perspective amongst Christians?

If there is an anti-rock music movement amongst Christians, where did it originate? What is the basis for the belief? Are there particular Bible verses or doctrinal stances that underpin the anti-rock stance?

In answering the question, note that I'm not interested in debating whether or not rock music is actually immoral. I just want to know if / why groups of Christians believe it to be so.
After reading several of the comments, it appears that many are taking the original question, "Is rock music sinful / immoral" and rewriting it in their heads as "If I listen to rock music, does that make me a rank sinner?"

As Paul put it...


  I Corinthians 6:11-13 And such were some of you: but ye are washed,
  but ye are sanctified, but ye are justified in the name of the Lord
  Jesus, and by the Spirit of our God. All things are lawful unto me,
  but all things are not expedient: all things are lawful for me, but I
  will not be brought under the power of any. Meats for the belly, and
  the belly for meats: but God shall destroy both it and them. Now the
  body is not for fornication, but for the Lord; and the Lord for the
  body.


Is it expedient to listen to a song that contains lyrics about traveling down the Highway to Hell? As one commenter noted, this song may be theologically accurate, but the lyrics are that "I'm on the highway to hell". No thanks. That's not expedient for me to sing along to.

Jesus admonished us to remember Lot's wife, who was so in love with the things of the world (Sodom) that, as fire fell from heaven, she had to turn back around to get one last look.


  LUKE 17:32 Remember Lot's wife. Whosoever shall seek to save his life
  shall lose it; and whosoever shall lose his life shall preserve it.
  
  GENESIS 19:24 Then the LORD rained upon Sodom and upon Gomorrah
  brimstone and fire from the LORD out of heaven; And he overthrew those
  cities, and all the plain, and all the inhabitants of the cities, and
  that which grew upon the ground. But his wife looked back from behind
  him, and she became a pillar of salt.


As Paul said, "but ye are washed, but ye are sanctified, but ye are justified in the name of the Lord Jesus, and by the Spirit of our God." Sanctification brings separation. 

I believe true sanctification produces a difference between what you used to be, and what you are today in Christ. The difference between what you used to do, and what you do now, should be so obvious that anyone can see it, and you become a living testimony to all men.


  I Corinthians 3:1-2 Do we begin again to commend ourselves? or need
  we, as some others, epistles of commendation to you, or letters of
  commendation from you? Ye are our epistle written in our hearts, known
  and read of all men:


Summary:
To say that listening to rock music makes you a sinner is legalism. On the other hand, make sure you are washed, sanctified, and set apart, and aren't turning back like Lot's wife.