I think me and rent 2 pwn covered most stuff there
You are wrong about cannabis being physically addictive though.
Haha you got your information from rehab? That explains a lot, rehab clinics are there to get people off drugs, so they make things up, bend the truth etc to scare you. If you think it doesn't happen then you are the naive one. I can assure you my information is correct, and yours (mostly) isn't.
I trust science over rehab clinics, as one is extreeeeeeemly bias, ill let you guess which.