I'd argue the market would react well to curated porn as well. Clearly, almost every single person online is interested. Remove the malware and unintended cons

I'd argue the market would react well to curated porn as well. Clearly, almost every single person online is interested. Remove the malware and unintended consequences (e.g. other people stumbling across your browsing history) and it would also be a huge hit with a substantial market. Further, I think it's wrong to slip social judgment into a largely technological concern. Porn is something some users may not want and certainly don't want showing up when their kids use a device, but it's hardly on par with malware and viruses.