There is several scientific study which says that marijuana doesn't provoc physic's addiction. Which means you can smoke a mountain of pure joint , then stop everything, your body won't feel the need of marijuana ( no tremors or sweats that you can have at different level with alcool, tabac, heroine, cocaine even the cafeine)
However the marijuana provoc a low psychic addiction. It means when you're used to smoke it, you may want to smoke it as much as you can.
Marijuana can also increase paranoia on subject which have antecedent on paranoia.

But the most important, canabis is good to get high :)
unfortunatly , impossible to find here