I've chatted a couple of times with manufacturers about counterfeit cans ... and it's a stunningly pervasive problem. Monster has taken the problem into its own paws, and teamed up with the Trading Standards Service in the U.K. and is making headway evidently:

BRISBANE, Calif., April 5, 2011 /PRNewswire/ -- Monster, a leading manufacturer of cables, headphones and consumer electronics accessories based in Brisbane, California, U.S.A., in conjunction with a member group of the United Kingdom Trading Standards Service (TSS), today announced the largest seizure ever of counterfeit Monster products in the U.K. The raid, which took place in February 2011 in England and resulted in the seizure of hundreds of counterfeit Monster products, is the result of a recently announced exclusive alliance between Monster and the TSS aimed at identifying, investigating and prosecuting criminals in the U.K. dealing in illegal product sales.

Full story here.

If you'd like to dig further into the world of counterfeit headphones, check out www.fakeheadphones.com, here's their page on Monster.

How hard is it to buy fake Monster headphones? Just buy them from an unauthorized dealer and you'll probably get a pair ... yes, they're that common. If you want to get what you pay for, buy from an authorized dealer.

Here's an example of a place to buy fakes.