Do you drug test your teens?  

That... is actually pretty scary. Surely you should learn to breed 100% faith in your children without needing to use a'kit' as a threat/deterant. There're other ways of looking for evidence without that. It does sound a handy accessory though, but surely they should have the strength to say 'No' without the 'Because my mum may test me.' They arent really learning to be strong enough to withstand peer pressures, because they are under the pressure of tests and kits at home.
Is a good way of looking for the most important and damaging drugs - but as children age some of the things they face temptations for (such as smoking or alcohol) actually provide learning steps in many lives. The latter, alcohol, being something which can be done when in a safe environment, and be quite enjoyable. The kids may appreciate having a test around now, but when they come into their own minds and (as all teenagers naturally do) question authority - it may become something that causes arguments about trust, privacy and growing up. Its going to take a firmer understanding between parent and child to cover those bases once they hit 17-20 when the threat of a test tends to diminish in... well threat.

Happy mylotting x