> It's much harder to try and make a spam filter read your mind on whether email from a legitimate business is something you're interested in reading (you may or may not care for that order confirmation, newsletter that you may or may not have signed up for, etc.).
No don’t be silly, if you use that button you’re actually breaking the whole system.
You’re just supposed to sit there and take the unsolicited non-spam from everyone around you and never touch that button ever, or dare call something that doesn’t fit one person’s ridiculously narrow definition of “spam” that.
And if you don’t like it, your inly course of action is obviously talking to your representatives to change the legal definition of spam. Anything else is breaking the system.
Hence, the "Report Spam" button.