Buro, you said
"Warming the skin does not by itself stimulate regrowth. Probably a waste of time or possibly dangerous to the follicle."
-Offcourse overdoing anything could be harmfull. My massager does not produce any heat that can be felt in the air. And hardly any when the massager itself is tounched. You may confuse the type of infra red light it uses with other kinds of infrared light. I mean I once owned an infra red lamp, wich produced a very hot light, this could indeed cause a burned skin, if used more than 15-20 min. However my new massager has no way of producing the same effect.
Do you have any proof of your claim that it could harm the follicle. I mean the net has plenty of claims of the opposite.
Example:
"Widely used in Europe, the hair loss treatment Luce LDS 100® uses low level light energy to heat and massage the scalp, while simultaneously expanding the pores. The invisible infrared light increases cellular metabolism, blood circulation and oxygen supply, making it an effective form of hair restoration."
Peter