Some to protect the unwary reader, and some to protect the author.
What if we had abandoned the charade, and revealed ourselves to our unwary allies?
During these encounters, bigger, more dominant grizzlies sometimes kill younger bears (and unwary humans).
Lincoln had digged a pitfall for unwary feet, and the great opportunist fell therein.
They are the ones chiefly dangerous to the unwary pursuit pilot.
The lynx and panther crouched among the branches, ready to spring on the unwary traveller.
But a few other wolves saw the fate of their unwary brothers.
In groups of three or five they would ambuscade some unwary wayfarer and many fell victims to their cunning and deadly arrows.
They threw out railway schemes as lures to catch the unwary.
We were inspected very minutely and asked seemingly ingenuous questions, each doubtless with a subtle trap for the unwary.