Our referrer logs show tons of hits from:

http://cookie-law-enforcement-ii.xyz/

This is classic referrer spam.

The above site links to

http://cookie-consent.org/?lang=en

Which is a mini marketing project of

http://front.to/

Which according to ahrefs and google, nobody has ever heard of.

Looks to me like they're building a massive Javascript botnet.

Why?

There's a lot of things you can do, right? Keylog all website visitors (?), replace all adsense units with your own ads, use all the clients/visitors as a DDOS botnet, click fraud (?), serve downloads, serve exploits, etc...

The developers/websites have a sort of effortless polish that makes me more curious than I would otherwise be.

If this is indeed shady, and it looks like it, this is scary. I imagine a LOT of webmasters might fall for this.