If I were the customer, I'd be telling them to sit and spin, and to be expecting a letter from my attorney in my upcoming lawsuit for slander/libel. Maybe next time, a company will look at the track record for these types of incidents, and do a little more digging, before immediately jumping to a potentially business-killing decision.
It looks like the customer was never named. There is no case for libel or slander. However the restaurant needs to give the guy free meals for life.
"...be expecting a letter from my attorney..."