Let's have a network, where people log in using applications over the DNS servers, and connect to other applications through the main campus firewall. Then....lets reconfigure the DNS server settings and where they point to and redirect to. But let's do that during the day, when everyone is in the office and we can immediately know that no one can get into these applications and they can call us and get angry and complain. But let's not tell the IT Tech what we're doing, let's let her find out when 10 people all call and e-mail her within a 3 minute span of time and she comes over asking what we did.
That sounds like a truckload of fun. Don't you think?