Arggh, rotten b*st*rds! Guess people will have no way of knowing until they open their bottles. If then.
If you've never tried a Grange before, how would you know if your bottle was counterfeit? Particularly if the counterfeiters took the trouble to replace the wine with half-way decent but less expensive juice. Even Parker gets them wrong sometimes, despite having tasted the wine many times (though I doubt very much you could trick him with some really cheap substitute). Me, OTOH...
If the counterfeiters replaced the Grange with TBC, would a retailer reimburse the customer? Not bloody likely, unless the person was a really valuable customer. Grrrr...
Well, all the more reason to stick with American wines, though there is no inherent reason American wines will remain immune from counterfeiting in the long run, some of the prices are already high enough to tempt any counterfeiter.