Stack Overflow answers are licensed under a CC BY-SA license.[0] If you copy and paste a function without (at least) linking to the question, isn't that copyright infringement?
That appears to be true for the https://hughrundle.net website. It would be unreasonable for the author to complain about consent for people sharing his blog posts anywhere after publishing a public license granting consent to the whole world to do just that (as long as people are following the license).
It does not appear to be true for the https://ausglam.space/@hugh Mastodon account. Copying the Mastodon posts and sharing them on Twitter without permission is a copyright violation, and generally rude.
Note the copyright implications, too - these outlets claim copyright on every word, including the copypasta, and never distinguish what they actually do own copyright too; and don't.
I posted a copyrighted work on Destroy All Software, which offers paid subscriptions to that same work. You found a link designed to be shared as a sample and decided to copy my commercial work in full, on your website, behind your own login wall. You didn't ask first, or even tell me that you'd done it.
Links to that work convert into paying customers, which is how I buy food and pay my mortgage. You're not only infringing on my copyrighted work, but also depriving my small business of revenue. Remove the infringing copy of my work from your site immediately.
[0] https://stackoverflow.com/help/licensing
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