One area of epistemology, asks whether it is wrong to hold certain beliefs. William Clifford said:
It is wrong always, everywhere, and for anyone to believe anything on insufficient evidence.
The “ethics of belief” is often used in intro philosophy classes to begin debates about God’s existence. The following video also provides an example of why one might want to avoid beliefs based on insufficient evidence:
Apparently UFOs, God and whether people go to restroom all have the same evidentiary status according to this guy. I guess he doesn’t know that shit stinks…
Update: I just found a song that someone has made out of this interview.