Was it on Slashdot that the custom began of posting a warning along with links to TV Tropes—a warning that you risked losing anywhere between 2 and 5 hours of h

Was it on Slashdot that the custom began of posting a warning along with links to TV Tropes—a warning that you risked losing anywhere between 2 and 5 hours of hour life, clicking your way down the rabbit hole?