//...am uncomfortable that they are bringing in orders for people "likely to commit a crime".//
Why is that, bednobs? All sorts of orders are made every day against people who are "likely to commit a crime". Examples include non-molestation orders and domestic violence prevention orders. Orders are made keeping persistent shoplifters out of shops and people who cannot behave properly when they've had a drink out of licenced premises. When somebody has demonstrated that they have a propensity to commit crimes it is necessary to protect the public (as far as reasonably practical) from the effects of their activities. These berks have demonstrated (and stated) that they will continue to offend. The police and the justice system have a duty to prevent that reoffending and court orders, which provide for a greater penalty than the signature offence itself, are among the tools necessary to do that job.