Do scholars in our current time warn against some sheikhs?

It is necessary to stay away from tracking the mistakes of scholars and preachers, and to busy oneself with beneficial knowledge and righteous deeds. One should benefit from shaykhs known for their righteousness, piety, and knowledge, while realizing that no scholar is infallible. It is not permissible to warn against anyone except those who are known for their deviation from the methodology of the Salaf or who are innovators inviting to their innovation.