Then all I have to do is get 3 snipers, and don't blob them. I still have 3 snipers, ready to counternsipe. Sure, its a little inconvenient, but it doesn't degrade the sniper spam.
With that in mind, a flanking sniper can render two of the three useless by being out of their range, since they cannot occupy such a small space.
And for those that choose to be lazy and blob, they will find their snipers far more vulnerable than if they had invested the proper amount of micro into positioning.