boo! this obviously works but you're disrupting/robbing a paying customer of their service, and likely the router will be confused and neither of you will get a

boo! this obviously works but you're disrupting/robbing a paying customer of their service, and likely the router will be confused and neither of you will get a good service. The only acceptable use of this activity is if you pay on one device, and want to switch to use another, say a work, then spoof your work laptop MAC on the personal laptop. Then it's reasonable as there's no harm to another user.