Meh. If you're using Twitter's embed code to show info from Twitter's site on your own web page, then you get whatever Twitter wants to show you. This is not Twitter editing your web page, this Kevin Marks's web page retrieving code from Twitter, and letting unknown code run in the viewer's browser.

If you really want an immutable record of what Twitter had then copy'n'paste the text, don't use Twitter's embed code. Or you could capture a screenshot, just be sure to provide full ALT text so the text is still text.

Browsers that block Javascript should still see the blockquote text that's actually part of the page.

#Javascrippled, although not in the conventional manner.