Yeah, I love your "evidence". Editorials written by doctors. Throughout every link, "some experts suspect" "tanning beds possibly could" "could even" and so forth.
What you're talking about is proof positive of EXACTLY what I'm saying. All this talk yet there isn't a single study in existence which proves it yet the medical community yaps about this stuff constantly. Every link you posted- I read each one- is an editorial which cites theories. Too, each assumes that the given health professionals have an indepth knowledge of different wavelenghts of ultraviolet radiation and the degree to which they are able to penetrate skin.
Each year various theories that sound good on paper are called into question by newer studies such as the idea that calcium intake causes kidney stones, or the premise that cutting down on sodium is the most important factor in regulating hypertension, or that protein intake causes kidney damage and so forth.
I don't think anybody is surprised that 3 given doctors would express their belief that tanning beds are bad for you. In fact, it will probably take at least 5 years before anywhere close to half of doctors will begin admitting that moderate exposure to any type of UV rays can be healthy. We could also probably track down hundreds of doctors who will swear that steroid use causes penis shrinkage. Easier still we could find dermatologists who feel sunscreen should be worn 24 hours a day, even indoors and in winter.
Notice also that any discussion of outdoor activities or tanning lead by a health professional constantly emphasises cancer, cancer, cancer. That's a powerful word to throw around, especially when the majority of the public doesn't realize that with any effort at all put into early detection skin cancer is very, very rarely fatal.
Again, I'm not saying the more is better approach is warranted. I'm simply saying- in a forum where we generally try to be frank and take certain statements from the medical community with a grain of salt- that several aspects of this subject are exaggerated.