Here's the offending example, from an otherwise interesting blog article on the fate of Sgt Kevin Benderman (emphasis added) :
Lest fellow Agorists commit the same solecism, I copy the American Heritage Dictionary entry here infra :Kevin had to be silenced, least others follow suit and also start saying no—thereby bursting the bubble of the Washington consensus of high troop support for this war of choice in Iraq, among other issues about just what are we doing in Iraq.
lest Listen: [ lěst ]
conj.
For fear that: tiptoed lest the guard should hear her; anxious lest he become ill.
________________________________________________
[Middle English, from Old English (thȳ) lǣs the, (whereby) less that, so that not : lǣs, less ; see less + the, relative conjunction; see to- in Indo-European roots.]