Presently, Satan seeks to harm mankind -so it is best to go about one's business just as it is wise to avoid people who seek trouble or harm.
That is not to say we ought to have anything against Satan -but rather let God deal with him (and the other sinning angels).
Jude 1:8Likewise also these
filthy dreamers defile the flesh, despise dominion,
and speak evil of dignities. 9Yet Michael the archangel, when contending with the devil he disputed about the body of Moses, durst not bring against him a railing accusation, but said, The Lord rebuke thee. 10But these speak evil of those things which they know not:
James 4:
7Submit yourselves therefore to God. Resist the devil, and he will flee from you.
8Draw nigh to God, and he will draw nigh to you.
God allows the world to be affected by the sinning angels for a purpose -but it is best to avoid interaction with them. Some beings do not respect respect, and will take advantage of good intentions. They are similar to some humans, but much more powerful and intelligent. They ought not be disrespected, but it is wise to avoid them and resist evil by doing righteousness.
Before Christ became Christ, he went and preached to those sinning angels -because God would rather they not sin -but they are now reserved in restraint -doing only as allowed by God -until the judgment. It is not ours to say what will be the end result. Whether spirit or human, however, the evils that we do cannot be allowed to continue indefinitely.
Salvation wouldn't be much of a salvation of we just messed it up as we mess up the world now -so the most important thing about salvation is becoming different and better.
The world would be a paradise if we changed -and salvation will be a paradise because we will have been changed -and we must be or become willing to change.
Jude 1:6And the angels which kept not their first estate, but left their own habitation, he hath reserved in everlasting chains under darkness unto the judgment of the great day.
1 Peter 3:18For Christ also hath once suffered for sins, the just for the unjust, that he might bring us to God, being put to death in the flesh, but quickened by the Spirit:
19By which also he went and preached unto the spirits in prison;
20Which sometime were disobedient, when once the longsuffering of God waited in the days of Noah.......
Generally speaking, love keeps no record of wrongs -but we are to be wary of those who are not motivated by love.
