Satan is the master of deception.  He understands that he has but a short time to work.  There is an all out attack against the Christian during this end time.  The battlefield is in the mind.  He wreaks havoc on thought life and robs individuals of victorious living.  We have the authority, the dominion, the power given to us at Calvary to defeat this enemy.  We have to exercise that authority.  Access denied is a challenge to the saint of God to deny the enemy access, to live a victorious life and be effective in the kingdom of God.  We have been given the tools, we have to utilize these tools the way that God meant us to use them!