It's a form of Behavior Modification:
They don't have The Holy Spirit of God in their hearts:
But The Fruit Of The Spirit Is love, joy, peace, patience, Kindness, goodness, faithfulness, gentleness, self-control; against such things there is no law
• Galatians 5:22
Harassing people isn't Kind or Loving.
Another thing is, it doesn't do any good to get mad or even have a reaction because they are purposely trying to provoke people get a reaction to use against them even though they are the aggressors secretly. (Like taking a picture of you when you flip them off, record you when you cuss them out because they are harassing you Etc.)
I used to be afraid to talk about it, but now I tell everyone so they can witness the harassment while it's happening to me.
They will say your Mom's name, The name of your dog, Dress just like you on purpose, Say things you talk about with friends and family members on the phone, Say things you have posted on online forums and Youtube Etc. (All of these things have happened to me)
Oh, One Last Detail.
These people will Know Your Most Embarrassing, Shameful and Secret Sins because they use Masonic and Black Magic / Witchcraft / Sorcery to gain Intel on you and then will use it against you as Leverage and to Psychologically and Spiritually Harass you. It's kind of like the woman with A Spirit of Divination in • Acts 16:16-24 and it's because they are Demon Possessed . (This has Specifically happened to me) and there Is No Way they could have known such personal information.
As we were going to the place of prayer, we were met by a slave girl who had A Spirit Of Divination and brought her owners much gain by fortune-telling. crying out, “These men are servants of the Most High God, who proclaim to you the way of salvation.” And this she kept doing for many days. Paul, having become greatly annoyed, turned and said to the spirit, “I command you in the name of Jesus Christ to come out of her.” And It came out that very hour.
• Acts 16:16-24
So don't be surprised by this if it happens. Just make sure that you have repented and asked God to forgive you of your sins. Also, you should go to confession. Jesus gave The Church (Priests / Apostles) power to forgive sins on earth.
Also, only God can forgive sins.
Lord Jesus Christ Son Of God Have Mercy On Me A Sinner:
Make The Sign Of The Cross:
Jesus Christ Conquers
• The Divine Liturgy of St. John Chrysostom:
O Lord, Save Your people,
and bless your inheritance!
Grant victory to the Orthodox Christians
Over Their Adversaries,
and by virtue of your cross,
preserve your habitation.
Troparion - OrthodoxWiki
The Lord Jesus Christ said these Words to His Apostles' / Disciples :
If You Forgive The Sins Of Any, They Are Forgiven Them; If You Withhold Forgiveness From Any, It Is Withheld.”
• John 20:23
The article is meant to portray the problem from a different perspective than the OP.That article is not a good explanation of gang stalking. The article in the OP better covers this problem.
The Lord is going to show them the same Lack Of Mercy and Kindness that they show to others in secret:
For Judgment Is Without Mercy To The One Who Has Shown No Mercy. Mercy Triumphs Over Judgment.
• James 2:13
The article is meant to portray the problem from a different perspective than the OP.
It's Nothing New.
The Church has had to go through Persecution Openly and Secretly for 2,000 Years from Pagan Rome (Emperor Nero, Diocletian Etc), Communism "Bolsheviks" "Marxists", Secret Societies, Occultists (Like Saint Cyprian's former life before his conversion to Christianity The Lives of Sts. Cyprian and Justina
Cyprian and Justina - Wikipedia ) , Islam, Murdering Ottoman Empire Turks (Arminian Genocide), Heretics, Schismatics Etc.