I knew someone would say that, but no it's not (not even close!) because it was just a way to stop the stream of garbage without offending someone in a delicate situation. There was no component of aggression.
I guess you're entitled to your opinion, but unsubscribing someone from a newsletter because you don't want them to see things they might want to forward to you is definitely passive aggressive in my book (and also not terribly nice, IMHO).
He could have just installed an email filter instead. Though I can imagine a situation in which confronting the sender might be worse. Frankly, I don't understand why people really case so much about manually forwarded junk. I mean, it's trivial to identify; I don't even open it if I don't care, usually. Since it's manual, it's unlikely to turn into a real flood, so I've never noticed this to be a problem...
