Perspective Break

The Isle of Man does a lot to actively combat the consumption of the major problem drug in their society. There are many organisations trying to repair the damage caused and to educate young people in the use of the two most harmful and socially acceptable drugs openly available for sale all over the island.
If you speak to these people they will let you in on which is the biggest problem.
http://www.gov.im/dha/police/cau.xml

The only figures I can find are in the year 2002/2003:
Drug events / arrests were:

65% Alcohol
14% Cannabis
2.1% Heroin
1.2% Benzodazepines
under 1 % Amphetamines and Cocaine

By gender it was:
76% Male
24% Female

I think the IOM government are putting their resourses in the right places like most other countries.
Prohibition didn't work but I suppose they could consider the male drinking problem and ban all Irishmen during the TT fortnight.