Another example of "Malicious interference": some teams in the Deep Dark old days of Sweepstakes required significant amounts of electrical power in the truck or tent on Race Day, and many ran an extension cord inside Maggie Morrison and used the nearest electrical outlet to get power.
Mysteriously, the power would go out shortly before the start of the heat. Sent to investigate, a member of the organization which lost power would run inside, only to find the plug firmly in the wall socket. Much yelling and screaming commenced.
It turned out *somebody* had found the circuit breaker panel, and had intentionally flipped the breaker on their competitor's electrical outlet at the most inopportune moment .....
Following that experience, the next year we positioned a member at the breaker panel, with instructions to use violence if necessary to keep the breaker on.
"I love the smell of solvents in the morning -- they smell like... victory."