[sigstoat]

> unfortunately there's no way to test that somebody smoked in the last day or two, only that they've smoked in the last X weeks/months, depending on their habits.

no non-invasive ones, anyways. :(

blood test does fine for checking whether you're high at the time of draw.

[bdcravens]

Perhaps the technology will develop that enable finger sticks similar to those diabetes use, or transdermal readings.