I just went on to the website for the local police force (http://www.police.gov.je/) and went on to the drugs section.. these are basically the pros and cons that they've put for Cannabis..
"Effects
It can reduce the ability to carry out complicated tasks which means that it would be dangerous to drive, for example, after taking it.
Inexperienced people using high doses, or taking it when anxious or depressed, may sometimes experience panic.
Like tobacco, frequently inhaled cannabis smoke will cause bronchitis and other breathing disorders. It may also lead to lung cancer.
Cannabis is not addictive, but users come to rely on it as a way of feeling more relaxed socially.
Cannabis takes effect very quickly. If it is mixed in with a drink or food, however, it is difficult to know how much has gone into the body. This can be very distressing, especially if alcohol is involved.
What It Does For You
Makes people feel more relaxed and talkative."
haha what a load of shite lol