Jayhad:
they could be charged with this though, which is a hybrid offence (can be an indictable if the crown so chooses to proceed that way)...
Criminal Code Section 430
Mischief
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.
and the punishment is as follows:
(4) Every one who commits mischief in relation to property, other than property described in subsection (3),
(a ) is guilty of an indictable offence and liable to imprisonment for a term not exceeding two years; or
(b ) is guilty of an offence punishable on summary conviction.
so they COULD spend time in jail for this..... though I doubt the crown would proceed that way unless there were extenuating circumstances, like a long record of trespass/mischief, etc
cheers