Sorry for the bump, I missed this before. This is a really good point, and something I think Doctors need to be aware of. I did the Ashton method taper off Xanax in 2003, when I didn't even know that's what it was called (Psychiatrist set it up, my GP took care of the rest). At that time the vast majority of people I interacted with, who were doing the same sort of taper, on support forums were absolutely legit. But then something else started creeping in where folks became keen to do an Ashton taper as either a way to seriously prolong having to come off benzos, or to scam more benzos by pretending they were serious about tapering, and oh look at this great taper method I've just randomly discovered.
Obviously you don't have to 'punish' (for want of a better word) those patients who would legitimately benefit from doing this type of taper, but I agree with being wary and proceeding with an abundance of caution.