The Guardian | Bob Brown launches challenge to law targeting 'disruptive' protesters The Guardian Former Greens leader, Bob Brown, has launched constitutional challenge against Tasmanian legislation. Photograph: Paul Miller/AAP. Michael Safi · @safimichael. Thursday 10 March 2016 00.07 EST Last modified on Thursday 10 March 2016 00.13 EST. Tas govt unfazed by Bob Brown legal case Bob Brown challenges Tasmania's anti-protest laws in High Court Bob Brown challenges Tasmanian government |