Imagine, you have come to the library to learn and suddenly, from nowhere there was a whole bunch of Asians and they all want to talk about something and make a noise. Do not they realize that the library need to be quiet. You have suffered as much as they could, but this can no longer tolerate bullying, you have to catch and expel all uneducated Asians who make noise. These people, even before allow themselves to talk on the phone is the ultimate boiling point, you need to sort out with them, go ahead!
