Now that lasers are pretty cheap... And you can get ends on them that will split them into lines....
couldn't we get a laser that shoots out a big + sign... big enought that the horizontal and vertical lines will go edge to edge on the screen?
If so, are there any senser strips that we could put around the monitors that would then be able to say that one laser part crossed here, here, here and here... and with those 4 points, we know it's pointing here....
it wouldn't be as good an end solution as the other idea I had because it wouldn't allow for multiple guns... but it would remove the flash, and allow for constant polling for machine gun games.