The particular Sci-Hub trade-off is one that shouldn't worry you. If Pornhub are made responsible for user uploaded content it won't make any difference to Sci-Hub because they're already flagrantly infringing. It's not a grey-zone user-upload operation, its express purpose is to "remov[e] barriers in the way of science" in defiance of copyright law. It's "black" Open Access (in the sense of the pirate flag) and not something within the reach of US regulators (otherwise it would already be toast).