The huge New York City public WiFi project, LinkNYC, has declared a milestone this week, announcing that its 547 kiosks have reached one million registered WiFi users and 4m sessions, one year after deployment. This is only the tip of the iceberg for the smart city venture, with plans to grow to a total of 7,500 kiosks. These kiosks provide a number of modcons for the general public – free WiFi, charging stations, maps and a large, red emergency services button. But when companies like LinkNYC have such prominent commercial interests, their impact and influence over citizens and their cities needs to be a major consideration – or councils risk handing over the keys to their smart city experience to…