From the article: “Unsurprisingly, this skyrocketed searches for the best VPNs. According to a SlashGear report sent to Mashable, searches for “Texas VPN” jumped by 1,750 percent in the past day. It also spotted a 1,600 percent increase for the phrase “How to access Pornhub.””
The right way to implement this is where they don’t even have any persistent identifier that could be used for tracking. They should only ever see a derived single-use signature that after verification gives them a yes/no answer and nothing more.