I understand that the odds of repercussions are small and that there are no damages on Adobe's side since you haven't physically taken their goods so it would probably have to be taken up by the public prosecutor rather than become a civil case... but still, I'd not be happy having my name on a "doesn't pay their bills" list, nor is it quite honest.
Or am I misunderstanding the situation and did they advertised with monthly cancelable? (False advertising) Nobody mentioned that in the thread though, and from this comment it sounds like it was very clear that you were agreeing into a year-long subscription: https://news.ycombinator.com/item?id=24232282