Annoying Noises

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Something that bugs me is when people make annoying noises like tapping, humming, or just being obnoxious. I hate when people do that because most of the time, when I say something about it, they continue doing it just to annoy me. I think if someone is doing that, they are just bored and sometimes they probably don't realize they are doing it. It just makes me go crazy and sometimes it makes me have a headache because it gets so annoying. I also think that people who are always making noises are thinking about something  and they just don't realize that they are doing it.