About mid 2008 there was some pretty lively (and heated) debate on this site regarding the Crimes (Controlled Operations) Act (introduced late 2008). See here and here.
I hadn’t really thought about the issue until I came across this media release, detailing the first time a matter has gone to court using this new legislation.
Those who are for this legislation generally believe it is good that police have extra power to nab more drug dealers, while those against believe it is open to corruption, as has happened in other jurisdictions, and that there will not be adequate supervision of police involved in these operations to prevent corruption.