Here's the thing: those who would participate in the 'online cease fire' likely fully understand the horror of the actions of that day, and are thus just about 0% likely to perpetrate such an act in the first place.
So what good is this supposed to do?
What I would rather see is that shooters get a patch that allows the players to access a basic tutorial on firearm safety from within the games' main menu. Voluntarily
patched, that is, and also place firearm safety info on the games' website. I mean, if we're going to approach feel-good measures after this incident from the angle of firearms and games, then do so in a manner that might actually lead to safer firearm use and ownership.
edit: I wonder what people here would think of calling for a cease fire at a shooting range?
I was planning to meet the wife at the shooting range over her lunch hour Thursday. Wanna shoot me some virtual paper-target psychopaths with virtual bullets on the V-range.