Because they know they are scary looking, and when you see them you'll be scared, so boo is what comes into their minds as a response.
2007-12-04 11:26:47
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answer #1
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answered by ssphotoshop 2
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Stupidity.
2007-12-04 11:28:04
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answer #2
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answered by Richard B 7
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Some find it hilarious to scare you.
But if you are staring at them, or look like you have spaced out, they will say boo to get you to stop cuz u r creeping them out
2007-12-04 11:25:34
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answer #3
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answered by Anonymous
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They might think you're staring at them and when they look back, there's usually an awkward silence, they're just trying to break it. That's all.
2007-12-04 11:45:17
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answer #4
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answered by zoelikescake 2
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It is an old custom. When you see a hideous creature, you yell boo and hope it goes away.
2007-12-04 11:24:05
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answer #5
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answered by frogskin13 4
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So you will be sure to know that they saw you looking at them.
2007-12-04 11:38:41
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answer #6
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answered by soupkitty 7
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well people don't just say it when you look at them. they only says it when you have a starring problem.
2007-12-04 11:24:04
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answer #7
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answered by ? 5
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Being random.
2007-12-04 11:27:38
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answer #8
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answered by |{enz!e 2 dance 4
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to be funny, random, try to scare you, or to make them not look at u.
2007-12-04 11:23:33
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answer #9
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answered by xoxoxo 5
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