There's the potential for that. The concern has actually been the opposite. My understanding is that there have been a number of instances in which there have been international investigations with a Canadian component, and there have been concerns as to whether or not Canadian authorities could cooperate and hold up their end of the bargain. It's been less about trying to go after true Canadian-based spammers and more about ensuring that Canada doesn't ultimately become a barrier to international spam investigations because the agencies that have certain information aren't empowered to share it with their counterparts in other countries.
On June 11th, 2009. See this statement in context.