Your example is as far fetched as far fetched can get, so much so that it is comical because how many people playing FFXI are doing what you have tried to illustrate in that picture?
You've searched the most craziest/extreme image online and posted it.
You're telling me that people are alt-tabbing between screens to play (even though you can only run one instance legitimately and I doubt they are running 5 VM's)...
They are controlling numerous characters with spot on reactions by alt-tabbing through 6 different screens?
Please.....