Actually... who cares! I have mine in the garage. I do what I want to it and could care less what others think about my choice of wheels, paint, or interior. I never see people making comments like these at the shows when the actual owner is present, so why do it where he or she is not likely to see it? When a vendor or other respected member of the TR community chops, cuts, and drills on a nice car to make a TSO, TSM, or other caged up, frame altered, creature comforts removed 130+++ mph car it's cool though...
They are just using their cars to compete in a different fashion and shouldn't be disrespected for it. I'm sure for those in the market to buy there are still plenty GN's and TR's to choose from.