Yep, interesting area of study.
I used to use Cannabis myself up until fairly recently and stopped for respect of my God given body and also for the reason that I didn't want to deal with the anti-social types I was buying from.
I found it useful for stress relief and basic observation of life. But I found that it strips the conscience away when stoned and leads to paranoia with extended & extensive use.
It is interesting to note that up until around 1937 it was used as a medicine. I think it may have it's beneficial uses, if refined and used correctly. It is definetly a fantastic pain killer!
I am not sure that the substance used within the anointing oil was in fact drawn from a strain of the Cannabis plant (who knows for sure?). This argument would be presented more often IMO and appears to be simply the witterings of fringe groups desperate for orthodoxy to give the nod of approval.