MichaelStroke: It's something done by people who can't putt worth a damn.
Tell Phil Mickelson about it (examples on youtube).
And, it doesn't matter as long as people score.
MichaelStroke: Needless to say, I don't do it.
You're giving away a chance for creative golf play, where success may come from a shot that narrow-minded people would not imagine. No offence intended.
I rather be avid to look for opportunities. Frequently, I use Driver from the fairway, sometimes putter from a bunker. And before you criticise me, look up Bubba (driver+driver+putter for an eagle in Hawaii) and Arnold Palmer: