I suppose. But I'd think that people would know by now that online tracking is ubiquitous. Arguably there are no "established social norms" online. That's one huge advantage, when it's about accessibility of stuff that's verboten or restricted in your society. Such as, for example, porn.

But it cuts both ways, of course. So established social norms about privacy are also widely ignored. The fundamental business model is based on violating users' privacy. Two of the largest online businesses, Google and Facebook, rely on monetizing the violation of users' privacy.

So yeah, perhaps it's understandable, but it's gobsmacking naive to think that online porn would be an exception.