On aggregate, junk email, enabled by disrespecting marketers and ongoing minimisation such as your comment, will waste months.
At scale, it might take up to a few minutes off your day and under certain circumstances (heavy spam) even start contributing to a mental fatigue. It's a minor nuisance but a nuisance nonetheless.
regardless, it introduces a non-zero chance that legitimate email might be misclassified
it seems like everyone in the ad industry has this opinion - if you don't like it, just delete it and move on. but there are thousands of them, and somewhere in there is that job offer I really need.
Edit: I forgot the context. I should have said the FTC.
> Each separate email in violation of the law is subject to penalties of up to $46,517
I can't get myself into a frame of mind where I'd find myself defending spam. I'm genuinely fascinated. Why are you taking this angle?