I think one's reasons for modifying oneself are going to be intensely personal and differ from individual to individual.  I do not believe it right to judge another's reasons for modifying as right or wrong based upon one's own internal criteria or one's own reasons for modifying oneself.   Modifying for the sake of attention isn't an inherently bad reason to modify because, again, one's reason's for modifying are going to be individual.  My reasons for modifying, for example, may not be the same as someone elses but that doesn't make my reasons or theirs any better or worse than the other. 

I would also take some issue with the assertian that modifying for attention cannot fit into one's core value of the modification.  While I personally don't modify for the attention, I have come to realize about myself that I don't dislike most of the attention I recieve because of it and would even go so far as to say that I enjoy the attention.  Yes, I have other more central reasons for my modifications, but I don't think I can honestly claim that attention doesn't play some small part in my reasons for doing so.  I think of my own body modification artist as well, who has stated to me quite directly that he loves attention and I most certainly do not respect him any less because he happens to enjoy the attention his modifications grant him.

The sorts of issues I have with fanatacism stem from individuals trying to foist their reasons for modifying upon others and try to foist their beliefs upon others.  I do not think its respectful to look down on others because their beliefs are a little different and even less respectful to try and forcibly change their beliefs to better reflect one's own beliefs.  As long as everything remains individual and no one is trying to change how anyone else believes or anyone else chooses to modify or not modify, I don't have a problem with whatever shade their beliefs happen to take.