You click a link to a news site, to read an article that seems interesting.
On the page that loads there is the article, but also, somewhere on the right, often near the bottom, there is a small video player. Inexplicably, it was not blocked by your ad-blocker.
It is auto-playing a news video that is not connected to the article. Sound is often on.
@grishka I'm ready to advocate an HTML entity whitelist basis.
A site starts off permitted
<p> and nothing else. If it turns out it can be trusted to not abuse markup, a wider scope of permissions is afforded.
Non-semantic use of elements revokes privileges.
Any annoyance of users / betrayals of trust are of course prohibited.
Penalties should apply both in browser and in search rankings / reputation.
On the internet, everyone knows you're a cat — and that's totally okay.