I grew up in Seattle which is less than 2 hours from the Canadian border. I always thought the following idea would be a fun and enjoyable way to spend a Sunday afternoon.
A group of us could fill up a car trunk with hundreds of clear plastic bags full of white baking ingredients — flour, sugar, baking power, baking soda, etc — and then drive back and forth across the Canadian, US border. If stopped and searched, we would insist that we were planning on baking a whole lot of cakes.
In the absence of laws against harassing mounties and the US Customs officials, this would be a very good plan.