Losing School Supplies

Just in the first few weeks of school, I lost 1 protractor, 1 30-cm ruler, 1 15-cm ruler, 3 pencils, 2 erasers, and 1 sharpee. This is just plain dumb. I wish people were more considerate of others and not stealing supplies. Seriously, it's not just by plain accident that the stuff disappears. My blazer also got stolen from my dorm weeks ago. I didn't wash it, and I only wear it on Tuesdays, and yet it disappeared on Thursday. I had to buy a new one for $100+.