Should alcohol interlocks be mandatory when their implementation is problematic?

The trend of making mandatory the use of alcohol interlocks for first-offender intoxicated drivers is emerging in Canadian and U.S. jurisdictions, but the trend is challenged by often-ineffective implementation, according to the Traffic and Injury Research Foundation.
In its report The Implementation of Alcohol Interlocks for First Offenders: A Case Study, TIRF examines the state of Illinois’ experience in an effort to provide Best Practices for jurisdictions contemplating such a program.
“The question is not whether first offender interlock laws should be implemented, but in fact how these laws can best be implemented and executed,” TIRF said in its report.
TIRF poses the question of whether the use of alcohol interlocks should be made mandatory, when currently there is little assurance the offenders will install the device and be monitored.
Or, the reports asks, is it better to strengthen program structure and implementation to ensure adequate resources are allocated before making the use of the device mandatory?
For the complete report see http://www.tirf.ca/publications/publications_show.php?pub_id=250