The ‘Unsubscribe’ experience needs to be improved
Mark Jenkins

OK, seems I’ll be the only one to say something in defence :)
Actually, it won’t hurt to leave some feedback to the newsletter authors in the simplest of forms — selecting a checkbox. Especially if you had subscribed once, even some time ago. Thus they can understand the reasons — and yes! improve the subscribe/unsubscribe experience. If you want a metaphor, it’s either leaving the party slamming the doors behind you, or saying oh, I have to run now — have to go to school early tomorrow.
Not defending the ridiculously huge forms or cheaters who wouldn’t unsubscribe you after, of course.