I say it's better to over feed the under feed.
You can change water, you can't bring back a fish that starved to death.
That said, Over feeding a tank with out a good skimmer (Like an SWC), and/or that is not established is a great way to watch a tank crash, but a well established tank with a good skimmer, live rock, live sand, etc. I think is ok to over feed a little. Of course I don't mean to take 5 cubes of shrimp and dump it in the tank all at once. I usually put in a baby food jar 2 cubes of mysis, a pinch of flake and a cube of squid. Then I pour a small amount into the tank, let the fish feed, about 10-20 minutes later I put in a little more, etc unitll it's gone.
90 Gallon Drilled Glass Tank w/ Corner Overflow: 492w (2x 150w 14,000K MH, 2x 96w Actinic CF) Coralife Aqualight Pro | Custom 34x15x15 Sump/Refugium | SWC Skimmer | Coralife Turbo-Twist 6x UV Sterilizer | Maxi-Jet Power Head w/Sure Flow Upgrade Kit | 120lbs of Live Rock | 100lbs of Live Sand