KTVX'S RANDY HOFFMAN called to express some concern over my characterization of his current late-night Night Court $1,000 give-away as a sweeps ratings "scam" (OK - let's be honest. He was mad as heck). Following is his rebuttal: "You're absolutely right that we're trying to attract more viewers to `Night Court' during the ratings period. But we intentionally scheduled the contest for the middle of the month so we would be able to see the impact of the contest by having comparable numbers from the week before and the week after. If the contest does skew the sample we'll be able to see it - and advertisers will be able to see it. We felt this was the responsible way to do it, with no one being misled."