One who is in the line of disciplic succession cannot manufacture his own way of behavior. There are many so-called followers of the Vaisnava cult in the line of Caitanya Mahaprabhu who do not scrupulously follow the conclusions of the sastras, and therefore they are considered to be apa-sampradaya, which means “outside of the sampradaya.” Some of these groups are known as aula, baula, kartabhaja, neda, daravesa, sani, sahajiya, sakhibheki, smarta, jata-gosani, ativadi, cudadhari and gauranga-nagari. In order to follow strictly the disciplic succession of Lord Caitanya Mahaprabhu, one should not associate with these apasampradaya communities.

From Srila Prabhupada’s purport to Cc Adi 7.48