"Rethinking the War on Drugs" by Mark A.R. Kleiman, Jonathan P. Caulkins and Angela Hawken (Review, April 21) misleads readers into thinking that there are programs that will finally make headway into the drug problem. Can cities really afford to hire enough breathalyzer and drug-test monitors to check drug users twice a day? And will "swift and certain sanctions" do anything more than displace drug markets like a Whac-A-Mole game, or fill jails and prisons with nonviolent users?

Here is an idea:...