Under the cover of night is about the time one would expect an offer sheet deal to go down. No one likes to discuss offer sheets in the NHL. They're often seen as poaching players, tempting them away from their rightful teams. General managers tend to stay away from them because it "paints them in a bad light," despite the fact that it's a perfectly legal and fine thing to do according to the CBA and every other owner and general manager in the league.
Consider Shea Weber poached. The Philadelphia Flyers, again without the services of Chris Pronger for the foreseeable future, need a star defenseman. Shea Weber finished a year of a deal that paid him $7,500,000 -- the salary decided not by the Nashville Predators, but by an arbitrator. Weber is now a RFA, which gives the Preds first negotiating rights to him. Would they sign him to a long term deal? Would they trade him in fear of him walking away for nothing? Or -- and no one expected this -- would another team swoop in and offer up a deal too good to pass up?