One of the mean habits is peeping into the private lives of people. In this regard the Holy Quran says: O you who believe! Avoid most of suspicion, for surely suspicion in some cases is a sin, and do not spy
The Holy Prophet (s.a.w.s.) said: Do not try to find the defects of the believers. The one who remains after finding faults of his brethren, God Almighty remains after his defects and the one who is followed by God becomes dishonoured even if he hides himself in his hone.
Imam Sadiq (a.s.) said: Man is at the farthest point from Allah when he makes friendship with another person and in the mean while, recollects his mistakes, to dishonour him one day.
Also The Holy Prophet (s.a.w.s.) said: O those who orally claim to be Muslims but do not have faith in your hearts! Do not spy for finding hidden faults of the faithful. Truly if one spies to find faults of the believers, God also recalls his faults.
In conclusion it must be remembered that spying and being after the deeds and actions of the people is against the basic essentials of Islam. Sometimes some servants of the Islamic revolution do such things in sympathy for Islam and the revolution, whereas such things are against Islam and the interest of the Islamic society. The is why the leader of the Islamic revolution, in his 8 point order for the safety of collective peace and safe administration, on 24th Azarmaah 1361, said under article 6: -
Nobody has a right to enter anyone's house or shop or factory without the permission of the owner or to arrest anybody or follows him in the name of crime detection or to dishonour or insult anybody or to do any inhuman or un-Islamic deed or to listen to somebody's telephone or tape in the name of investigation however big the crime may be or to follow the secrets of people or to spy for others crimes or to reveal whatever he has received from one even to one person. All these acts are sinful and some of them are, greater tan the great sins. The one who commits it is a criminal and deserves to be punished according to Shariat.