I would agree with you. However, there are valid use-cases for &quot;intercepting&quot; DNS on public WiFi. The most obvious is to block adult content.<p>One example was a customer operating WiFi in restaurants. If a patron accessing the WiFi network was looking at adult content on their laptop, the restaurant owner could be liable for that. I believe it was a &quot;public nudity&#x2F;nuisance&quot; law.