Why should I have to create a filter when I never asked for the email in the first place?

If you're emailing me and I didn't ask you to, that's the definition of spam. Gmail has one button that does two functions. Report spam and unsubscribe. There's no way to have Gmail automatically unsubscribe you from a third party list without also reporting spam, so that's the only option I have. (On a side note, Facebook is something I use quite often so I have my settings there tuned to never send me an email. So your Facebook woes are not because of me, at least).

Mosquitoes serve a purpose as well, but I won't apologize for using a fly swatter.