is it possible to get rid of scan? so even if you spray scan to specfic area you can't see anything through scan effect..can it be?

Don't know if you can disable the effects of it, but you can disable scannersweep so noone will be able to use it. Look at the tech settings of your map.

Or you can switch the vision to the player himself OFF and give vision through computer controlled map revealers.

Scanner Sweep can be detected using Command, so it may be possible to turn off the players vision with himself whenever you detect a scan.