Actually MT I has been around for 20 years. MTII has been around allot less time. I've been on MTII for over 18 months straight, no hideous extra moles or growths. Now some of the small moles that I do have got darker.
But I was a type 1 skin type, white skin, red hair, burns never tans.
After loading up with 40mg of MTII I can swim for 2 hours with no burn, before I was lucky to do 15-20 minutes.
I still use sun block to avoid serious sun damage. But my skin has a natural spf to it now that it did not before.
For people like me going out in the sun is something that is always on your mind as a type 1. You have to plan your activities around it, you have to wear a shirt while everyone else is not. Swimming is something you have to do with a ton of sun block and a t-shirt, and even then you get burned on your face and slightly on the arms.
MTII has really helped many, many people. I have no ill side effects from it even on long exposure. I see my doc regularly along with the skin doc. That is just common sense even if your not on MTII. MTII very much has it's legitimate usage. Just like steroids have allot of stereotypes and rumors, so does MTII. Mis-information hurts allot of users.