Indulging in wine and meat, keeping long hair on one’s head, not bathing daily, and smoking ganja (marijuana) are some of the habits which are accepted by foolish creatures who do not have regulated lives. By such behavior one becomes devoid of transcendental knowledge. It is sometimes seen that devotees of Lord Shiva imitate the characteristics of Lord Shiva. For example, Lord Shiva drank an ocean of poison, so some of the followers of Lord Shiva imitate him and try to take intoxicants like ganja (marijuana). Here the curse is that if someone follows such principles he must become an infidel and turn against the principles of Vedic regulation. It is said that such devotees of Lord Shiva will be sacchastra-paripanthinah, which means “opposed to the conclusion of sastra, or scripture.” This is confirmed in the Padma Purana also. Lord Shiva was ordered by the Supreme Personality of Godhead to preach the impersonal, or Mayavada, philosophy for a particular purpose, just as Lord Buddha preached the philosophy of voidness for particular purposes mentioned in the sastras. Sometimes it is necessary to preach a philosophical doctrine which is against the Vedic conclusion. In the Shiva purana it is stated that Lord Shiva said to Parvati that in the Kali-yuga, in the body of a brahmana, he would preach the Mayavada philosophy. Thus it is generally found that the worshipers of Lord Shiva are Mayavadi followers.
Source: A.C. Bhaktivedanta Swami Prabhupada (2014 edition), “Srimad Bhagavatam”, Fourth Canto, Chapter 02 – Text 28 & 29