Vibing a wardriving visualizer

A while ago someone was showing off their LEGO creation in my social media feed: a brick-built QR-code containing the credentials to their WiFi network. People rushed to tell them that they shouldn&rsquo;t share this info publicly, but they appeared unconcerned, for who would actually even know where their network was physically located, right? Can&rsquo;t do any harm to it if you can&rsquo;t find…