If you are in a tank and you see a beacon placed by your team always drive towards it in the effort to stop engis/techs from disarming it. Block the path to it, or drive over it so they cannot see it. It is after all a team game, and if its disarmed your team effectively loses 300 pointsIf possible when placing the beacon alert snipers, they can cover the beacon quite effectively. Though for this you take away the aspect of the beacon being hidden, however if the snipers are good it can mean the difference between a successful beacon placement.