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I also had a computer hardware class in high school that the teacher would often leave for extended periods of time. The other students and I get enough systems running and scrounged a router so that we could play multiplayer Warcraft II during class (which was an old game even back then). We pulled this off for about a month before we got caught. It turned out the teacher really didn't care anyway.
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When I lived in rural Mexico, I used to tape pictures of Jesus to the outside of my packages that I sent home so that the shady people in the mail system wouldn't mess with them.
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My old boss used to add useless revisions every time that I sent him an email saying that part of a project was finished such as "Change the font up to 12px on that navigation please. What? It's already at 12? Can you make it 12 and a half? No, 13px is way too big but I want it bigger than 12 so just fix it OK?"...yeah, that guy. Anyway, I found that if I sent him emails at the end of the day, he would not read them until the following morning when he had the most emails to respond to. Therefore, sending him finished tasks at the end of the day meant fewer useless revisions. I found that outlook has a "delay delivery" setting so as I finished tasks through the day, I would que them to send at about 7:30 at night, when I could be sure that he wasn't working. Lo and behold, the endless revisions went down by about 90% and I got a lot more stuff done.