Whats the most evil thing you've done as a kid??

Tell me I want some tea (づ￣ ³￣)づ

Ill start~
I once put dishwashing soap in a girl's drink while everyone was outside, (We had a fight) She didn't notice until she drank like a quarter of her drink. In the end a girl who saw it snitched me out :( || (Oh btw she is fine, she went to the doctor, and they said there was nothing wrong)