The one common thread that I see in this discussion is the reluctance of many people to knight DJs with the term "musician." This reminds me of the early days of sequencing, when the debate was whether someone who step-entered music (or even quantized a performance!) was really a musician - not to mention those who created algorithmic music by programming. There's room enough for everyone. Whether or not you call someone a "musician" makes not a whit of difference, except to your own ego.