I don't doubt that a lot of people use VPN's for this. I also know based on surveys and internal data that the core user base of our service is using it for privacy protection and security reasons -> against ISP data collection and snooping. I don't have a problem with people watching porn, nor with someone using VPN to support this. This conscious use case however is very different from getting an unsolicited porn popunder in your face when you are streaming a football match.
I recently had a family member trip over one of those markov-chain strung-together-keyword redirect farms. It decided to stop the redirect-train at something fairly crass (a topless ad). This was straight from Google search results. First time ever; mildly unpleasant 5 minutes.
I'm seeing this as the next level after that, and yeah, VPNs are comparatively a much more straightforward field.
