BOLINAS: As a form of “standing with Standing Rock” pipeline protesters in North Dakota, Amelia Straton and others wrote love letters on Saturday to C.E.O.s of major corporations who are investing in the project. One letter to the C.E.O. of Wells Fargo, intoned, “May you be wise, may you be gentle with your mother, may you benefit all future generations, by preserving clean air, pure water, and living soils.”