Duh.

I recall reading, in a course in Church Fathers I took as an undergraduate, some guidelines from those early years for telling false prophets and the religious equivalents of crooked traveling salesmen, who were evidently all over the place, from true prophets and genuine preachers of the Word. 

It recommended that if they take your money and/or sleep with your wives you not trust them. I thought, "duh?" Those people must have been very naïve. Alright, and welcome to the twenty-first century. We elect and respect people who openly steal our money and sleep with anybody they want.