If you look on the back of your wifi gear, you'll likely see a stamp that says something to the effect of: "This device complies with FCC part 15 and will not

If you look on the back of your wifi gear, you'll likely see a stamp that says something to the effect of: "This device complies with FCC part 15 and will not cause harmful interference". The argument could be made that by using the device to send lots of deauth packets, that Marriott had modified the device beyond it's original scope, and was now using it to cause harmful interference (to other wifi devices).