One related term I found is the bandwagon effect.
In layman’s term the bandwagon effect refers to people doing certain
things because other people are doing them, regardless of their own
beliefs, which they may ignore or override.
The general rule is that conduct or beliefs spread among people, as
fads and trends clearly do, with "the probability of any individual
adopting it increasing with the proportion who have already done
so". (Colman, Andrew 2003) As more people come to believe in something, others also "hop
on the bandwagon" regardless of the underlying evidence.
Colman, Andrew (2003). Oxford Dictionary of Psychology. New York: Oxford University Press. p. 77. ISBN 0-19-280632-7.