Adding noise to images sounds like a really bad idea. It will mess with any Javascript code which performs processing on images. Try writing a photo editor in Javascript and watch your browser corrupt your images.
It's 'Suspected Fingerprinters' that controls the Fingerpritning Protection feature described in the blog post. But yes, naming and descriptions is hard and never seems to work.
But to disable it on a per-site basis, I would just disable ETP for the entire site. If it's a service or site you use frequently you probably trust them or otherwise have a login to them that makes trying to avoid fingerprinting illogical.
