How are collapsible batons a prohibited device? They sell these in some stores in Ontario. Looking through the list of weapons i see automatic deploying ones are in fact illegal but I dont see anything about the regular ones.
In the criminal code there are a number of martial arts weapons, regularly sold in stores, that are prohibited.
The only things that are identified explicitly in the CC are certain firearms and knives. The other prohibited items are identified in a Prohibition Order, which is like an appendix to the Criminal Code.
The items prohibited can be seen here
BSF5044 - Importing a Firearm or Weapon Into Canada
I am not a lawyer, but I have some training on this, and I think the key thing is how the "weapon" is being used (context) which defines whether it is regarded as a weapon too.
A toilet seat could be considered an offensive weapon if it is being used as a weapon.
BTW, there are people that are legally entitled to posses weapons that would be prohibited when possessed by an other. For example, tasers, collapsible batons, Tonfa batons, and pepper spray can all be possessed by Peace Officers, but not by others. Others would be charged with possession of a prohibited weapon.
Peace Officers have to buy their equipment somewhere. If the store is indiscriminate in whom they sell to, then that's a different issue, and the purchaser could be charged.
Victor