Actualy you could have it load the nodelets in the regular way. Then update those with the javascript. No javascript = no auto update. People with javascript on get a little added benifit and everyone else gets exactly what they get now. This is assumeing that we can somehow use a URL to get a single nodelet.

In my opinion Javascript should be stripped from homenodes anyway, but that is a different story. I'm sure that there are some reasons they are still allowed.