Dwelling on the faults and vices of others, is to invite our own Spiritual downfall
"Do not allow the mind to dwell on the faults and vices of others; it will be contaminated thereby. Fix it on the fairness and virtues of others; it will be sanctified thereby. I know that during moments of emotional frenzy, you set aside your real nature and you indulge in abusing others or wish that they come to harm or exult over their distress. Such evil thoughts get implanted in your own minds and grow wild, leading to distress and dishonour in return in your own life. Why worry about others? Speak to them if you like them. If you do not like them, leave them alone. Why seek faults in them and talk ill of them? To do so is to invite spiritual downfall. Such people lose all the gains they hope to secure by japa, puja, dhyana, or darshan (repetition of the Lord's Name, ritual worship, meditation and divine vision). They will remain bitter despite all these sadhanas (spiritual disciplines), like the bitter gourd which a pilgrim carried with him, intending to make it sweet by dipping it in holy waters."
Bhagawan Sri Sathya Sai Baba"