I do not think one can take the mark of the beast by accident. Or that someone could just stick the chip in you when you sleep. It has something to do with worship as well not only buying and selling.
That is true,for worship of the beast,and understanding his agenda,that there is no higher power than people,no personal God,and mankind can be greater by the power of nature,precedes taking the mark.
If a city decided they wanted its citizens to take the mark of the beast,what will be used at the beast kingdom,although they would not call it the mark of the beast,as a test run,and to see how smooth things would go,it would not count if they took the device,for worship of the beast precedes the mark.
And the mark of the beast,whatever device it is,will not be implemented until the nations are together at the beast kingdom,which I read that they were test running the microchip somewhere in California,but I did not check in to it.
I believe it will be the microchip,linked to Satellite,that will be used to keep track of the people of the world.
The beast's agenda is there is no personal God to help mankind,but mankind's technology,and devices,can cause the world to operate smoother,and provide for a more peaceful world.
On the chip all information of the person,including financial records,no person may buy or sell without the mark,and when their hand or forehead is scanned,a picture comes up on computer,with all information about them.
If a crime happens in an area they will know who was in the area,and how close they were to the crime scene,which crime would reduce,because people will be afraid to commit a crime,and if they try to get rid of the chip they cannot buy or sell anything.
Rev 13:18 Here is wisdom. Let him that hath understanding count the number of the beast: for it is the number of a man; and his number is Six hundred threescore and six.
666
chi xi stigma
khee xee stig'-ma
The 22nd, 14th and an obsolete letter (G4742 as a cross) of the Greek alphabet (intermediate between the 5th and 6th), used as numbers; denoting respectively 600, 60 and 6; 666 as a numeral: - six hundred threescore and six.
stigma
stig'-mah
From a primary word στίζω stizō (to “stick”, that is, prick); a mark incised or punched (for recognition of ownership), that is, (figuratively) scar of service: - mark.
I think it will be the microchip,and since the world is together trying to have peace on earth,and the beast's agenda is technology,and their devices,is the answer to help out in this endeavor,the mark of the beast will have to do something with technology.