Today, Hungry Jacks Whitfords refused to serve children under 17 without a guardian present.

The discrimination received mixed feedback, but the company was in their full legal right to do so.

Expert in juvenile justice and crime at Curtin University Dr Stephen Monterosso told Oliver Peterson on Perth Live the sign would not deter antisocial behaviour.

Press PLAY to hear why Hungry Jacks was allowed to discriminate against its customers