What has it been in the past?
In fact the WTS says that baptism as a jw is the mark mentioned at Ezekiel 9:4-6. That people who are not will die forever at Armageddon.
***Knowledge book chap. 18 p. 180 Make It Your Aim to Serve God Forever ***
Bible prophecies show that God views such ones as marked to survive the execution of his judgment soon to come upon this wicked system of things. (Ezekiel 9:1-6; Malachi 3:16, 18) Are you "rightly disposed for everlasting life"? (Acts 13:48) Is it your earnest desire to be marked as one serving God? Dedication and baptism are part of that mark, and they are essential for survival.
WHAT IS THE 2016 VERSION
In Ezekiel’s day, no one received a literal mark on his forehead. The same is true today. What do people need to do to be symbolically marked for survival? They need to react favorably to the preaching work that is taking place, put on the Christian personality, dedicate themselves to Jehovah, and loyally support Christ’s brothers. (Matt. 25:35-40) Those who do these things will receive the mark of survival during the coming great tribulation.
Notice that baptism is left out but implied. But also, the anointed on earth are not doing the marking, are the angels then?