On our campus, there are WiFi routers almost everywhere (at least inside buildings) but some areas definitely have a spottier connection, since the campus is quite large and there are many big open outside areas.

Now to connect to their WiFi, when you attempt to connect to it, it prompts you for your student username and student password (can't remember the type of connection this is off the top of my head).

What's to stop someone from walking around with a laptop acting as a router with the same name as the real routers automatically collecting my student username and password as I walk by it? If nothing really, is there something that I should be doing so that my username and password isn't collected, besides simply not using the provided WiFi?