Alas, people have forgotten the “data:” URL scheme.

data:text/html,<marquee%20direction=up><marquee%20direction=left><blink>Look%20at%20me%20gooooo!!!!</blink></marquee></marquee>

Haven't forgotten it. Just not using it cause it's more difficult. No need to do something more difficult if I don't have to, right?

"data:" is also disabled by default in Firefox.

You mean hyperlinks to data: URLs? At least that's not a problem here, as HN doesn't linkify them anyway, so you'll already have to open the URL manually.

No, I meant manually opening data: URLs is disabled. It's a social engineering worry.

Unfortunately, no blink there, btw.

there is for me :)