I don't go in with guns blazing when something goes wrong, but when I get no response to a problem, I get mad. For example, one time the LGA Crowne Plaza overcharged me on a phone bill. I asked for a correction of it at the front desk and they refused, insisting that it really is long distance to call from Queens to Manhattan. That is when I load my guns and start blazing them.
Screw-ups are one thing; ****up after ****up after ****up is what makes me mad.