Druids must ever walk a fine line in the world of Aeleon. While not banned, they will be treated with disdain by society in general. Further, if druids are deemed to regard nature more highly than one of the Three, they will often face punishment or death. As such, it is not uncommon for druids to multiclass as a cleric of one of the Three or otherwise show themselves to be a true worshipper of one of the Three.
They must also never be found to be consorting with intelligent creatures of the forests such as dryads, pixies, brownies and so forth. To do so invites punishment.