Remarks: Corporate sponsorship of events at The Oval is understandable; events like last weekend’s Master Speed Skaters’ Championship aren't open to the public, so the public shouldn’t pay for them. But these ads have stayed up, even through the public skating Monday. City council, which sets the rules, has not approved corporate sponsorship of The Oval itself, and this opens up a whole can of worms about advertising on the Common. We say, emphatically: No ads for public skating! Levy hasn’t responded to a request for comment.