Depends on how you look at it. Lots of forums (high end audio) ban and prohibit people flipping off items for a profit. For example somebody buys X product from seller for $450, list it on the same site a week later for $600. Ethically not a right thing to do. Or you're given a review item for free, then you flip it off for $500 a month later after the review (generally this breaks NDA contracts as well), people do it and do eventually get caught doing it. I have no respect for people who flip things off via any of the methods above.