Haha, probably not "outraged". After a restaurant employee follows me out of an establishment knowing I had a take-out order, and then yells my name and flips me the bird?... I'd toss the food out as well, out of an abundance of caution.
I would have called the owner, told him/her of the incident, and asked for a full $80 refund--that's a lot of money for some of us to just throw away. Then, I would tell everyone the name of the restaurant so they could avoid doing business at such a hateful place.