Spam is annoying the way polluting the ocean or mosquito bites are "annoying". I don't personally see a lot of ocean trash, and nobody I know has ever died from a mosquito bite, but there are massive harms with worldwide impacts caused by both.

In my view, the refusal to accept responsibility and the willingness to repeat and continue his offenses without any regard for the harm it causes suggests sociopathy, or at the very least narcissism.

I think your estimation is grossly underestimated too, Nigerian prince scams trigger (insufferable) workplace discussions which take 5 minutes or longer, for upwards of 5 people, spam that causes people to spend money they otherwise wouldn’t increases the wealth gap, impacting lives for generations.

Directing attention to your business, even without permission, is older than the Internet itself. We've had generations of TV, radio, and newspaper advertisements, as well as stickers placed on lamp posts, flyers in shop windows, or menus placed on doors of homes or hotel rooms. Some advertisement is welcome and paid for, others are done without being caught. But it's all in the name of profit.

It's people who refuse to act responsibly in a community because they have zero regard for the negative impact they have on others that matters here, not which particular asshole would be first to act purely out of selfishness.

"Directing attention to your business" isn't a problem either, any more than "setting down your butchers knife" is a problem. It's when, where, and how you do those things that can make it a problem. It's the difference between plunging your butchers knife into your dishwasher, and plunging it into someone else's chest. People can advertise, with or without permission, without polluting the internet and turning their selfish behavior into a multi-billion dollar a year problem for everyone else to clean up.