Here's a hint as to what is implanted into the foreheads of those who reject the mark...
KJV Ephesians 4
30 And grieve not the holy Spirit of God, whereby ye are sealed unto the day of redemption.
KJV Revelation 9
4 And it was commanded them that they should not hurt the grass of the earth, neither any green thing, neither any tree; but only those men which have not the seal of God in their foreheads.
KJV Revelation 14
1 And I looked, and, lo, a Lamb stood on the mount Sion, and with him an hundred forty and four thousand, having his Father's name written in their foreheads.
KJV Revelation 22
3 And there shall be no more curse: but the throne of God and of the Lamb shall be in it; and his servants shall serve him:
4 And they shall see his face; and his name shall be in their foreheads.
As for those who accept the mark of the beast in their foreheads I think it may be someone else's name...
KJV Revelation 13
6 And he opened his mouth in blasphemy against God, to blaspheme his name, and his tabernacle, and them that dwell in heaven.
KJV Revelation 16
9 And men were scorched with great heat, and blasphemed the name of God, which hath power over these plagues: and they repented not to give him glory.
KJV Revelation 17
5 And upon her forehead was a name written, MYSTERY, BABYLON THE GREAT, THE MOTHER OF HARLOTS AND ABOMINATIONS OF THE EARTH.
What is at stake in these last days? What is it that for 6000 odd years had been the focus of God's intentions in order that man could once again trust Him rather than sin against Him? Is it not to re-establish His good name? The issue of these last days is not your survival or well being. The principal issue is your loyalty and whose authority you are willing to submit yourself to. In Revelation 13 and Jesus's warnings, the recurring theme is deception and worship. Loyalty and worship. God's commandments or men's commandments?
Remember, in vain do they worship me, keeping as doctrines the commandments of men.
Remember this when deciding whose side you are on.
Loyalty
Worship
Obedience
Doctrine.
All these are tied together and find unity and harmony in the Father's name. They find disunity and variance under the harlots name.
Now ask yourselves. Which of the commandments has the Father's name in it?