well changing the MAC can be evidence for this: imagine you get banned from your university network for breaking the terms of use (lets say torrenting) - you c

well changing the MAC can be evidence for this: imagine you get banned from your university network for breaking the terms of use (lets say torrenting) - you change your MAC address so you can get back on the network. you know you've been banned and you've made the conscious decision to bypass the security of the network.