Pseudo religionists have neither knowledge nor detachment from material affairs, for most of them want to live in the golden shackles of material bondage under the shadow of philanthropic activities disguised as religious principles. By a false display of religious sentiments, they present a show of devotional service while indulging in all sorts of immoral activities. In this way they pass as spiritual masters and devotees of God. Such violators of religious principles have no respect for the authoritative acaryas, the holy teachers in the strict disciplic succession. … Instead, to mislead the people in general they themselves become so-called acaryas, but they do not even follow the principles of the acaryas.

These rogues are the most dangerous elements in human society. Because there is no religious government, they escape punishment by the law of the state. They cannot, however, escape the law of the Supreme, who has clearly declared in the Bhagavad-gita that envious demons in the garb of religious propagandists shall be thrown into the darkest regions of hell (Bg. 16.19–20). Sri Isopanisad confirms that these pseudo religionists are heading toward the most obnoxious place in the universe after the completion of their spiritual master business, which they conduct simply for sense gratification.

(From Srila Prabhupada's purport to Sri Isopanisad mantra 12)