You can read Nick's response in
Open Letter to Jeff Simmermon, which fully demonstrates the point Richard made above.
I have mixed feelings about Murky's service policies (e.g., no to-go cups for cappuccinos and espresso, or as in the blogger's case, no iced espressos). On one hand I admire their policy's counterbalance to the Venti Soy Vanilla Decaf Extra Hot Latte of the corporate espresso world. On the other hand, a policy with no allowance for genuine customer preference seems counterproductive. They could use these "transgressions" as an opportunity to educate. For example, they might prepare your drink as requested, if you agree to read and initial a brief explanation of why it's not the best way to serve their product. Or they could impose a $0.25 surcharge in such cases and donate the proceeds to CoffeeKids. Or even offer a one-time "Murky's Way" drink. That is, the transgressor is served a similar drink prepared to Murky's standards and if the customer doesn't like it, they get a full refund.
Of course, none of these suggestions address "ghetto latte" cheats.