Canada might need these sooner rather than later.
With the breakdown of democracy and the rule of law in America, the Constitution just became wholly unenforceable and therefore irrelevant. That means that Trump could make good on his fever dream of invading Canada.
And there are many Americans who would jump at the chance to obey his command to slaughter Canadians. With only 40M against America’s 334M - and 0.097M military personnel against America’s 2.1M - it would be absolutely no contest.
Our only way of making such a fascist act of aggression as painful as possible would be with asymmetrical warfare using tiny, hard-to-defeat drones that could act independently and strike without warning. Deploy 10k of these suckers onto a battlefield, and the only survivors would be those within sealed armour or flying at high altitude. Because even an A10 Warthog loitering low over the field can be taken out if it unexpectedly ingests a half-dozen of the explosive buggers.