Five games based on previous instances of suspensionable conduct.
5 game suspensions are saved for pretty severe situations. There is no way this merits 5 games. The most recent incidents to get 5 games come from Bynum's mid-air elbow on Barea, Villanueva following Ryan Hollins into the locker room to continue an altercation, and Antonio Davis going into the stands.
Artest, as mentioned earlier, got 7 games for concussing James Harden with an elbow to the head. Artest has a worse history than Rondo. This, in no way, shape, or form, gets 5 games. Rondo's history merits 1 instead of 0.