Or, you know, you could just not have spam. Not in boxes with a label, not in boxes without a label. Just stop spamming. No "but what about ...", just stop spamming.
Oh god someone understands me, I have a climax.
That's how newsletter subscriptions work on the internet.
What's silly about that? They go next to the "hey I want theft", "hey I want fraud", "hey I want arson" stickers.