Ex. 23:2, in discussing the prohibition against making false reports or accusations, reads as follows in the NIV: "Do not follow the crowd in doing wrong. When you give testimony in a lawsuit, do not pervert justice by siding with the crowd." In other words, the defence used by children everywhere, "but everyone's doing it," would not work in God's courts. We can almost imagine the judge replying, as so many mothers to their children, "But if everyone jumped off a bridge, would you do that too?"
The answer, of course, is "no." Unfortunately, most people can't resist going along with a crowd, then or now.