I actuall have no idea whether using a laser jammer is legal in BC, Canada. So I posted in a thread on a Vancouver automotive forum. One of the admins is currently an officer in VDP and he answered my questions by quoting the following:
Criminal Code s.129
Every one who
(a) resists or wilfully obstructs a public officer or peace officer in the execution of his duty or any person lawfully acting in aid of such an officer,
(b) omits, without reasonable excuse, to assist a public officer or peace officer in the execution of his duty in arresting a person or in preserving the peace, after having reasonable notice that he is required to do so, or
(c) resists or wilfully obstructs any person in the lawful execution of a process against lands or goods or in making a lawful distress or seizure,
is guilty of
(d) an indictable offence and is liable to imprisonment for a term not exceeding two years, or
(e) an offence punishable on summary conviction.
R.S., c. C-34, s. 118; 1972, c. 13, s. 7.
But there is no specific law against jammers. What do you guys think?