Attempt #2:
Word:
Lie
You may find me fast:
Example, the liar quickly finds a false answer to give in response to an inquiry.
My answer is transparent:
Bad lie, obvious lie, white lie (immediately known as a lie upon reception). Or more literally, a lie has no substance.
to those restive few who went off:
?
Their egregious oversight:
Either the liar made a mistake in telling the lie (by telling a bad lie or messed up a detail etc.), or the receiver missed that it was a lie.
Left to scan and screen:
The liar or receiver could be mulling over the lie and the details.
Hear my refrain:
Lies could be told to avoid or end a discussion.
bound to draw the story out:
When the lie is discovered, the whole situation blows up into something bigger than before.
Hint 1:
Maybe this isn't an original riddle?
Hint 2:
The contradictions could be deliberate acts of misinformation, sort of a form of a lie.
Hint 3:
[Red] Herring - "a misleading clue" (a small lie). Two-Faced: "deceitful or hypocritical."
Maybe this is silly, but I think the answer is:
Transparent
You may find me fast:
My answer is transparent
literally telling us the answer
to those restive few who went off
Their egregious oversight
Left to scan and screen
Kept reading instead of just taking the answer given in the first two lines
Hear my refrain
bound to draw the story out
Again, "I wrote this to distract you"