May I just first comment on this assumption that 'adriftfeline' makes that "Lucifer and his angels" do this and that. The only Scriptural, and therefore inspired reference to Lucifer is found in Isaiah 14:12 as follows:
12 How art thou fallen from heaven, O Lucifer, son of the morning! [how] art thou cut down to the ground, which didst weaken the nations!
People never seem to read the context of the verse they look at. This is specifically speaking of a king who had lorded is over others and was being brought down by God. Just read this through:
Isa 14:3 And it shall come to pass in the day that the LORD shall give thee rest from thy sorrow, and from thy fear, and from the hard bondage wherein thou wast made to serve,
4 That thou shalt take up this proverb against the king of Babylon, and say, How hath the oppressor ceased! the golden city ceased!
5 The LORD hath broken the staff of the wicked, [and] the sceptre of the rulers.
6 He who smote the people in wrath with a continual stroke, he that ruled the nations in anger, is persecuted, [and] none hindereth.
7 The whole earth is at rest, [and] is quiet: they break forth into singing.
8 Yea, the fir trees rejoice at thee, [and] the cedars of Lebanon, [saying], Since thou art laid down, no feller is come up against us.
9 Hell from beneath is moved for thee to meet [thee] at thy coming: it stirreth up the dead for thee, [even] all the chief ones of the earth; it hath raised up from their thrones all the kings of the nations.
Isa 14:10 All they shall speak and say unto thee, Art thou also become weak as we? art thou become like unto us?
Isa 14:11 Thy pomp is brought down to the grave, [and] the noise of thy viols: the worm is spread under thee, and the worms cover thee.
Isa 14:12 How art thou fallen from heaven, O Lucifer, son of the morning! [how] art thou cut down to the ground, which didst weaken the nations!
Isa 14:13 For thou hast said in thine heart, I will ascend into heaven, I will exalt my throne above the stars of God: I will sit also upon the mount of the congregation, in the sides of the north:
Isa 14:14 I will ascend above the heights of the clouds; I will be like the most High.
Isa 14:15 Yet thou shalt be brought down to hell, to the sides of the pit.
Isa 14:16 They that see thee shall narrowly look upon thee, [and] consider thee, [saying, Is] this the man that made the earth to tremble, that did shake kingdoms;
Isa 14:17 [That] made the world as a wilderness, and destroyed the cities thereof; [that] opened not the house of his prisoners?
Isa 14:18 All the kings of the nations, [even] all of them, lie in glory, every one in his own house.
Isa 14:19 But thou art cast out of thy grave like an abominable branch, [and as] the raiment of those that are slain, thrust through with a sword, that go down to the stones of the pit; as a carcase trodden under feet.
Isa 14:20 Thou shalt not be joined with them in burial, because thou hast destroyed thy land, [and] slain thy people: the seed of evildoers shall never be renowned.
So verse 4 tells me that it is the King of Babylon who is being addressed as Lucifer.
On the general question angel = messenger
hell = the grave, or on some occasions gehenna (from the Valley of Hinnom) the place where they burnt the rubbish and unclaimed bodies outside the wall of Jerusalem. It is certain churches, poets and painters who have embroidered this idea as with Lucifer to make it something so sinister.
Those concerned were thrown down to the grave, there have been those in Scripture who have flowted God's commands.