430 (1) Every one commits mischief who wilfully
(a) destroys or damages property;
(b) renders property dangerous, useless, inoperative or ineffective;
(c) obstructs, interrupts or interferes with the lawful use, enjoyment or operation of property; or
(d) obstructs, interrupts or interferes with any person in the lawful use, enjoyment or operation of property.
So they found them guilty with the vaguest charge they had?
"Mischief" sounds like teenage hijinks but carries a maximum sentence of a decade of incarceration.
It's basically a "catch all" when they can't find an actual crime to charge you with https://laws-lois.justice.gc.ca/eng/acts/c-46/section-430.html
Mischief
I've heard it's Canada's Disturbing the Peace charge.
Not really, we have that law too https://laws-lois.justice.gc.ca/eng/acts/c-46/section-175.html