@rasmus_kaj
I think that is a great example of scraping without consent. The way it would be with consent is if the post on Mastodon clearly states: ”Comments to this post will automatically be displayed as comments on the blog post as well.”
When adding posts from social media in my blog posts I tend to ask for permission. I’ve done that quite a few times over the last week without having written the blog posts yet.
Historically, a large majority say yes but a small number say no. And if they say no I do not use their post, or I refer to it anonymously without link or personally identifiable information, and with different wording.
I’ve deployed tools similar to what you describe in the past but after spending enough time recognizing the people who do not appreciate un-anticipated attention, I want to avoid any harm that I could inadvertently contribute to, emotional or otherwise.
For tools like this there is also the added risk of people publishing data about others, which would then automatically end up on the blog.
I’m not saying what your best course of action is but it’s always good to feel confident about having considered potential harm and one’s own contribution if it happens.
The ethical reasoning is what I am encouraging, not necessarily whether something is legally allowed.