LOL.. Ya kind of. Coz I remember somone guy on a forum metioning an app which enabled him to do that so others around him weren't able to use th wifi like him.. Don't remember the name. Just wondering if its possible? Lol
So my second suggestion will work. But you'll probably still look mean when someone asks why you can connect to wifi and they can't, or why they could connect to wifi last week, but can't any more.