[jamesbrownuhh]

And fundamentally, the visibility of the pint glass is not a "guilty / not guilty" switch. Even if something that looks like a pint glass is on display, no matter how well faked, it still comes down to whether Sky have a record of having sold a commercial subscription to the address at which it is observed.

So it's a useful indicator, but only one of many, and therefore doesn't have to be fully bulletproof.