Depending on who you are and how you tend to react to such things, you might start to get really, really angry, or really, really insecure. Or both. How dare someone treat you that way. Is there something wrong with you? Do you look like a victim?
Do you look obnoxious? Do you look like the kind of person who blocks grocery aisles on purpose, just to get a chuckle out of inconveniencing people? Do you look like an idiot?