I did a quick search of the forums but didn't find anything related to this. I came across this page on the FCC's site that states deauth attacks and jamming of WiFi are illegal in the US as of January, 2015. They also state the following:
If you read the example they gave about a Marriott hotel deauthenticating users it appears the FCC doesn't know the different between that and jamming a signal. Of course they added that catch-all statement that any device that interferes with WiFi communications is illegal. Page 2 of that document states that no commercial establishment is allowed to