This is quite mean, hate me if you want lol, but I thought it was funny at the time, but I still feel a bit mean for doing it. When I was at High school last year (I've left now), I had this Technology teacher who always left his Cup of Tea on the table, when he went into the machine room where they have all the high-tech machinery where students cant go, I grabbed his cup and went to the toilet where I pissed in his Tea. I put it back on the table when I came back and watched with pleasure as he drank it, he didn't really notice... except he kept pulling funny faces everytime he took a sip. Call me evil, but I'll tell you why I did it. My Lil-Sis who goes to the same school doesn't get on with him, and one day she was chewing gum in his class, so like teachers do he told her to spit it in the bin, but as she did she picked up a peice of chalk messing about harmlessly and he told her to put it down, when she kept saying no, he grabbed her by the collor, dragged her quite hard into his office and pushed her into it. The teacher was given a disciplinary, but that wasn't enough... I wanted the bastard dead! so i began plotting his murder. JOKE LMAO! no I wanted to get back at him myself so I did that. Do you think I went over-board?
