Pocket Breathalyzers unreliable

Here is an article I picked out from the MADD Canada website that i thought was interesting:
http://www.madd.ca/english/news/pr/p05nov28.htm

MADD Canada Releases
November 28, 2005
Pocket breathalyzers - inaccurate, unreliable - and dangerous
MADD Canada does not endorse, nor condone use of personal breathalyzer devices
A new pocket breathalyzer called the 'Alcohol Tester' is inaccurate and unreliable and its use is not endorsed by Mothers Against Drunk Driving - says MADD Canada's Chief Executive Officer Andrew Murie.
"Using the pocket breathalyzer is like playing Russian-roulette with your life and the lives of other motorists," says Mr. Murie. "These personal breathalyzers can be inaccurate in their readings and, therefore, are not at all a reliable read of a person's intoxication level."
"More importantly, they encourage the risky behaviour of drinking up to a certain limit. People shouldn't be driving at all if they need to test themselves. A person should not drive after drinking alcohol -- period."
"This product is a tragedy-waiting-to-happen," adds Mr. Murie. "It's dangerous."
The Alcohol Tester is currently being featured at check-outs in Bay and Zellers stores across Canada. Mr. Murie does not understand stores that promote an item related to drinking and driving. "No responsible retailer would feature this product. At a time of the year when there is a great deal of social drinking, this is sending the wrong message about drinking and driving. Retailers should be promoting safe alternatives that don't involve that dangerous game of drinking up to the limit.''
"Police and many groups increase their efforts at this time of the year to convey to the public to separate drinking and driving activities. People need to be taking public transit, taxis or planning for rides when partying through the holiday season." Mr. Murie urges, "Save the dollars spent on these unreliable breathalyzers and take a cab."
The Alcohol Tester says clearly on the back of the package that 100 per cent accuracy is not guaranteed, nor does the product provide the same results as the breathalyzers used by police.
MADD Canada warns people who might think pocket breathalyzers are a thoughtful gift for a loved one to think again. ``If it shows a false reading and gives that person the idea they are OK to drive and they are caught, they have no protection. They are breaking the law.''
"At our current legal limits, most people wouldn't even think twice about their inability to drive. However, the pocket breathalyzers give people a different message. And, because their readings are inaccurate and unreliable, it is a very dangerous message," says Mr. Murie.
MADD Canada does not condone the use of the pocket breathalyzer. Despite what the promotions claim, MADD Canada in no way endorses these products.