[xigoi]

Couldn't you still recognize the script by its content?

[freedomben]

No because the script contents can change from site to site. Maintaining an index for every site would get you closer, but individual sites can trivially tweak things to break fingerprinting as often as they want. Even on every request.

[shafyy]

Exactly, this is already done for tracking scripts, since it's commong to use proxies to load tracking scripts.

[ComodoHacker]

Not with dynamic obfuscation.