What happened to the inter-agency communication that we were supposed to have now ?
These people should be kept track of in the same way (hopefully) that sex-offenders are.
After all, there could be potential terrorists hiding amongst them, and any criminal history they might have will be unknown.
Some kind of lengthy probationary period where their whereabouts is always known HAS to make sense.
We have computer systems these days. If your car isn't taxed or insured the authorities will certainly have all the details.