Here's a gimmicky, but creative idea on how the players could pressure the owners to cut a deal with the refs if they don't want to do a full-on boycott:
Have the players' union announce that until the real refs return, the players will pick several games each weekend at random, and refuse to start playing the game until about 15 or 30 minutes after the scheduled start time. Just long enough to wreak havoc with the TV schedules.
If the networks try to adjust coverage accordingly, then randomize. Change the length of the delays. Do it after half-time instead of before the game. My guess is that after a week or two of this, the TV networks will put so much pressure on the league that the lockout will be over.