It's an interesting question, because not all His judgments are as direct and unmistakable today as they were during New Testament times. But I believe there is the following element at work: To whom much has been given, much will be expected. God holds others accountable for the things they experience and are shown. In New Testament times they witnessed His power at work, and His Spirit being poured out in abundant measure, with the apostles doing many mighty works. At such times I believe men are held even more accountable, and those times will come again, and are here even now for those who walk in greater responsibilities towards God.
But so you can see it from scripture, I will quote some of the primary passages from the New Testament. I have already included the last and the first, but I will quote them again for reference sake.
27 whoever eats this bread or drinks this cup of the Lord in an unworthy manner will be guilty of the body and blood of the Lord. 28 But let a man examine himself, and so let him eat of the bread and drink of the cup. 29 For he who eats and drinks in an unworthy manner eats and drinks judgment to himself, not discerning the Lord’s body. 30 For this reason many are weak and sick among you, and many sleep. 31 For if we would judge ourselves, we would not be judged. 32 But when we are judged, we are chastened by the Lord, that we may not be condemned with the world. 33 Therefore, my brethren, when you come together to eat, wait for one another. 34 But if anyone is hungry, let him eat at home, lest you come together for judgment. And the rest I will set in order when I come. (1 Corinthians 12:27-34)
18 “And to the angel of the church in Thyatira write... I have a few things against you, because you allow that woman Jezebel, who calls herself a prophetess, to teach and seduce My servants to commit sexual immorality and eat things sacrificed to idols. 21 And I gave her time to repent of her sexual immorality, and she did not repent. 22 Indeed I will cast her into a sickbed, and those who commit adultery with her into great tribulation, unless they repent of their deeds. 23 I will kill her children with death, and all the churches shall know that I am He who searches the minds and hearts. And I will give to each one of you according to your works. (Revelation 2:18-23)
1 It is actually reported that there is sexual immorality among you, and such sexual immorality as is not even named among the Gentiles—that a man has his father’s wife! 2 And you are puffed up, and have not rather mourned, that he who has done this deed might be taken away from among you. 3 For I indeed, as absent in body but present in spirit, have already judged (as though I were present) him who has so done this deed. 4 In the name of our Lord Jesus Christ, when you are gathered together, along with my spirit, with the power of our Lord Jesus Christ, 5 deliver such a one to Satan for the destruction of the flesh, that his spirit may be saved in the day of the Lord Jesus. (1 Corinthians 5:1-5)
1 But a certain man named Ananias, with Sapphira his wife, sold a possession. 2 And he kept back part of the proceeds, his wife also being aware of it, and brought a certain part and laid it at the apostles’ feet. 3 But Peter said, “Ananias, why has Satan filled your heart to lie to the Holy Spirit and keep back part of the price of the land for yourself? 4 While it remained, was it not your own? And after it was sold, was it not in your own control? Why have you conceived this thing in your heart? You have not lied to men but to God.” 5 Then Ananias, hearing these words, fell down and breathed his last. So great fear came upon all those who heard these things. 6 And the young men arose and wrapped him up, carried him out, and buried him. 7 Now it was about three hours later when his wife came in, not knowing what had happened. 8 And Peter answered her, “Tell me whether you sold the land for so much?” She said, “Yes, for so much.” 9 Then Peter said to her, “How is it that you have agreed together to test the Spirit of the Lord? Look, the feet of those who have buried your husband are at the door, and they will carry you out.” 10 Then immediately she fell down at his feet and breathed her last. And the young men came in and found her dead, and carrying her out, buried her by her husband. 11 So great fear came upon all the church and upon all who heard these things. (Acts 5:1-11)