Excessive, false, and insincere (in-sin) praise...can God honor it ? Should anyone believe it ? Sometimes we are so gullible, but there is no truth in it ! Is there a selfish motive lying beneath this "praise" in order to snare or to secure some benefit ? Some call it "flattery" . God says that it is vain. It is NOT the "REAL THING"!  Smiling faces tell lies...and there's plenty of proof.

Proverbs 26:28 King James Version (KJV)

28 A lying tongue hateth those that are afflicted by it; and a flattering mouth worketh ruin.