Stop in for a cup of coffee

Let me ask you all a question:

Your boss laid a guy off in December, it's March and she's still letting him come to the office and use a spare computer to play around on. He's a nuisance routinely but today has been the worse. First, he has the loudest non-argument phone conversation for almost an hour, thus annoying everyone. Then to top it off, he goes back to the break room and proceeds to help himself to MY lunch stuff...... Would you get mad and say something, or go to the boss and complain or simply ignore it?