What I wonder about is - are there popular things that require JavaScript that Dreamwidth could vet, then offer as potential "modules" to be included in a style? Something like how Wordpress has "plugins," perhaps? At least in system styles, to start, if not necessarily personally-created ones; maybe for paid users, if availability needs to be limited that way.

And then, to come up with a list of said desired modules. Would they mostly be external-site oriented (like, embedding your recent Twitter updates or Delicious bookmarks into the sidebar), or not so much (something like displaying a random quote from a list you provide every time the page is reloaded, or rotating through a number of headers)?

I guess the part of the issue I don't know well enough as a babydev is - is it just a matter of not being able to trust Random User's JavaScript code vs. code that would go through the vetting process of proper development for Dreamwidth? Or is it really that all JavaScript code is inherently pretty insecure and easy to exploit?