I have no problem with teaching kids about airsoft and responsibilities, I really don't. Almost EVERY city/town in Canada, however, have bylaws in place prohibiting the use of paintball/airsoft/firearms/bows, etc outside of licensed facilities. That means shooting it around your house, in public, is in violation of that, which in turn (thanks to airsoft being classified as 'uncontrolled firearms') opens up the users to federal criminal charges.
If you are going to teach, do so in the proper environment suitable to the activity, using proper safety equipment, with the proper licensing and insurance in place (that only protects you as well as your visitors).
The Tier One Tactical Operator
Tippmann Arms M4A1
KWA USP .45, KJW P226, KJW hi-cappa