- free ▁prov isions , ▁including ▁music ian ▁Joe ▁Jackson , ▁and ▁political ▁ess ay ist ▁Christopher ▁H itch ens , ▁have ▁claimed ▁that ▁reg ulation ▁efforts ▁are ▁mis gu ided . ▁Typ ically , ▁such ▁arguments ▁are ▁based ▁upon ▁an ▁interpretation ▁of ▁John ▁Stuart ▁Mill ' s ▁harm ▁principle ▁which ▁perce ives ▁smoke - free ▁laws ▁as ▁an ▁obst acle ▁to ▁to b acco ▁consumption ▁per ▁se , ▁rather ▁than ▁a ▁bar ▁upon ▁harm ing ▁other ▁people . ▁ ▁Such ▁arguments , ▁which ▁usually ▁refer ▁to ▁the ▁notion ▁of ▁personal ▁liberty , ▁have ▁themselves ▁been ▁critic ised ▁by ▁Nobel ▁Prize - win ning ▁econom ist ▁Am art ya ▁Sen ▁who ▁def ended ▁smoke - free ▁reg ulations ▁on ▁several ▁grounds . ▁Among ▁other ▁things , ▁Sen ▁argued ▁that ▁while ▁a ▁person ▁may ▁be ▁free ▁to ▁ac quire ▁the ▁habit ▁of ▁sm oking , ▁they ▁thereby ▁restrict ▁their ▁own ▁freedom ▁in ▁the ▁future ▁given ▁that ▁the ▁habit ▁of ▁sm oking ▁is ▁hard ▁to ▁break . ▁Sen ▁also ▁pointed ▁out ▁the ▁heavy ▁costs ▁that ▁sm oking ▁in ev it ably ▁impos es ▁on ▁every ▁society ▁which ▁gr ants ▁sm ok ers ▁un rest rict ed ▁access ▁to ▁public ▁services ▁( which , ▁Sen ▁noted , ▁every ▁society ▁that ▁is ▁not ▁" mon str ously ▁unf org iving " ▁would ▁do ). ▁Arg uments ▁which ▁invoke ▁the ▁notion ▁of ▁personal ▁liberty ▁against ▁smoke - free ▁laws ▁are ▁thus ▁incomplete ▁and ▁in ade qu ate , ▁according ▁to ▁Sen . ▁ ▁In ▁New ▁Zealand , ▁two