Really bad analogy.
1) Plenty of people take pictures of graffiti and children's sidewalk chalk drawings. There are communities dedicated to this.
2) Nobody was scraping your posts while you were drafting them. Your public statuses were scraped after YOU pushed them to a decentralized network of potentially thousands of unique servers representing hundreds of thousands of unique people.
@r000t Not to mention that posts have high discoverability, while graffiti requires you to drive around and seek out every one. You can automatically discover and scrape millions of posts from anywhere in the world, at any time convenient for you, with only a laptop.
A silly domain for test deploys, now has a mastodon instance. A place for memes as shitty as the name. Zero bullshit tolerated.