My friends and I used to build pipe bombs from PVC when we were teenagers. Never used to destroy property or cause injury. Mostly used on abandoned cars and thrown into sewer pipes for the echo.
Back on the temperature thing. I never understood why it was so difficult for people to understand that if they are cold they can put on a sweater, but if I am hot, I can't exactly walk around nude. Guess that's why I like working as a systems admin. Computer server rooms are kept nice and cold. Like TSQ, I keep the window open all winter in the bedroom with a fan going. I can't stand stagnant air.