well i bet i could bypass it if i was able to have about an hour on the network... depending on where the timer software is... its most likely on there system making it almost impossible for you to connect much longer... the only way around would be to convince the network you are a different computer every hour... then again how do they measure wifi? and how do they know that your using wifi?
lol id have to go in and experience their network to help... otherwise ppl can only give you a long shot in the dark at what to do