> If they shove it in your face, it's YOUR job to ignore it, not their job to somehow pre-determine who wants to see it and who doesn't.
No, it's exactly their job. It's the difference between pushing and pulling. If you want to show your content to people, start a webpage and put it there. No one gets the right to be offended by the content of a website they're browsing voluntarily. But conversely, no one gives you the right to shove the content in my face.
You have no right to be heard. If you try and force it, be prepared to get shunned by society. Just because it's legal to violate social norms does not mean that people will hate you any less for doing it.
See when I get mail from inconsiderate assholes, and it didn't get filtered, I look up the abuse contact of their provider. Then I forward the mail to them with a note that it was unsolicited. (In most cases I will CC their upstream abuse contact too because I'm nice like that.) With responsible senders, this works wonders. The irresponsible senders end up on blacklists and their asshole customers get terrible reach.