No license shall be required for any person to sell or attempt to sell, or to take or attempt to take orders for, any product grown, produced, cultivated, or raised on any farm. No license shall be required of any person going from house-to-house, door-to-door, business-to-business, street-to-street, or other type of place-to-place when such activity is for the purpose of exercising that person’s State or Federal Constitutional rights (i.e., freedom of speech, press, religion, and the like) except that this exemption may be lost if the person’s exercise of Constitutional rights is merely incidental to a commercial activity. Professional fund raisers working on behalf of an otherwise exempt person or group shall not be exempt from the licensing requirements of this section.