Do they not realize that the cars are rolling billboards advertising the mustang brand? If we stop driving or restoring them they lose all that free exposure. Again, the exposure of their brand and heritage is coming at no cost to them!
Let's take this a little further. Will our cars become worthless and unsellable because they contain aftermarket parts? Eg: Will a Shelby clone on ebay have to be pulled because a clone will be considered an unauthourized, illegal counterfeit? If the signage, buisiness cards, packaging and paperwork have to be surrendered to Ford or Shelby, then do gas caps, badges, wheel covers, etc. that contained the name when sold by these vendors have to be returned?