I'd say the standard in civil suits is the lowest ethically possible in judging people. It merely requires the claim to be more likely to be true that not. Below that, you're saying the claim is most likely false based on the evidence, but for reasons of extreme caution you will presume it is true. I certainly agree that happens in social media where the outcome of letting a "guilty" person get away with something is judged to be more unacceptable than the outcome of destroying an innocent person.