@ Aether:
Of course smoking a joint is worse than a cigarette, since you are adding the marijuana to the tobacco, and in most cases, without filter. If you use a bong, it is a lot cleaner but indeed there are still many chemicals that are nocive. Which brings me to your question. I know its harmful, and I do it because I actually derive pleasure. Addiction has been proven to be psychosomatic. I know if i get into a car I take the risk of getting killed. I know that I can be killed or harmed in many different situations, so I assess the risk and carry on. Are they bad for my health? Yes. Do I enjoy them? Yes.
I should be able to discern between whats good for me or not. It is me who is taking the risk. I am ok with it. You are not. Its a personal choice.
As for joints, trust me, you smoke one and suddenly you have lost your memory, sufferr from anxiety, distorted perception or trouble solving problems. It affects individuals differently, and in most cases these symptoms are only present if its use has been continous and high for a period of time.
Again, marijuana produces two ways of getting high, smoking the weed or making hashish out of it. WIthin each, some wil have CBC as the active enhancer, and others, THC. The latter is not present on hashish as the enhancer chem.