You guys probably have more experience of this law than us in the UK, But there is a campaign to get something similar here.
Does it work, or does it just drive the offenders deeper underground ?
Over here offenders and suspected offenders have been the subject of attack by vigilante groups, and some people later found innocent in a court of law have been seriously attacked and even killed.
I won't shed a tear over the guilty, but the prospect of vigilante groups being judge, jury and executioner isn't a good one, or is that a risk we have to accept ?

Go confidently in the direction of your dreams! Live the life you've imagined. As you simplify your life, the laws of the universe will be simpler.
Henry David Thoreau