Tommy Sheppard: Decriminalisation of all drug use could eradicate the underworld / Decriminalisation 'should be part of discussion' amid drug death increase - Neil Gray / B.C. drug use advocates warn decriminalization change may cause more drug deaths / Drug user advocates concerned about B.C.'s decriminalization exception request / B.C. to ban drug use in all public places in major overhaul of decriminalization / B.C. premier says public use rules should have been in place before decriminalization