Locking up someone for 14 days without charge in a terrorism investigation might enable a desperate government to win some points with voters but it is a charter for police abuse and any "evidence" obtained is likely to be of little value and rejected by a court as unfairly obtained.

Prime Minister Malcolm Turnbull’s proposal, similar to one mooted by Victoria’s government recently, is part of a package of new anti-terror laws he is proposing. If these laws see the light of day, it will bring to around 75 the number of anti-terror laws considered by, and in the main passed, by the federal Parliament since 9/11.