That's all kinds of stupid. You might retain some cash in the meantime and feel better about "sticking it to the man," but the reality is you entered into an agreement and from both legal and corporate perspectives, you're defaulting and committing fraud. Is it right? No, not at all. Do I hate that it works this way? Absolutely. But sticking your head in the sand and pretending everything is fine is a great way to get screwed. Enjoy it while it lasts; it's only a matter of time before you defraud the wrong corporation who will bend you over a barrel and show you the 50 states. I've worked in my fair share of customer service and customer loyalty departments before and I've talked to enough people who had no idea their debt had been sold to a collections agency to even pretend that your approach is the right approach.
If a company wants to face the worst Streisand effect they've ever experienced they can go ahead and try to put me over a barrel because their shitty sales tactics make it incredibly difficult to cancel their service.