Blimey. That's a lot of work. Glad you saved time by abbreviating it.
Did you give yourself a nickname at school too? :)
There is a trend towards imagining no harm comes from weed usage, and it's just a slightly unexamined position to hold.
Should it be legal? I think it's already accessible, so maybe making it "legal" would at least keep the money out of criminal pockets - and line HMRC's a bit more.
No one is going to be able to smoke it in a pub, club, or a public space - so it shouldn't be too much of a nuisance.
The only issue is the long term psychological damage it can do. Paranoia, depression and so on are regularly linked to prolonged weed usage - usually in men in their 40s, long after they've given it up.
We're hardly set for dealing with the luxury of mental illness currently, let along if we cause a epidemic in 20 year's time.