We are talking about importing airsoft guns into Canada ..... not carpentry materials. Let me see, one is illegal, the other is not.
As to what is clearly marked on the package, that gets done on a daily if not hourly basis by allot of people, not necessarily airsoft related.
You CAN go to jail for it, as opposed to bringing in door hardware. In case you haven't read the LINK that HKGHOST provided here it is again and I'll even bring you to the page with the actually court case.
B.C. court case