If one thinks that there are many pseudo devotees or non-devotees in the Kṛṣṇa Consciousness Society, one can keep direct company with the spiritual master, and if there is any doubt, one should consult the spiritual master. However, unless one follows the spiritual master’s instructions and the regulative principles governing chanting and hearing the holy name of the Lord, one cannot become a pure devotee. By one’s mental concoctions, one falls down. By associating with non-devotees, one breaks the regulative principles and is thereby lost.
One’s devotional service is spoiled when he becomes too entangled in the following six activities: (1) eating more than necessary or collecting more funds than required, (2) over-endeavoring for mundane things that are very difficult to attain, (3) talking unnecessarily about mundane subject matters, (4) practicing the scriptural rules and regulations only for the sake of following them and not for the sake of spiritual advancement, or rejecting the rules and regulations of the scriptures and working independently or whimsically, (5) associating with worldly-minded persons who are not interested in Kṛṣṇa consciousness, and (6) being greedy for mundane achievements.
Ref >> Srila Prabhupada Vani.