From Longman Dictionary of Contemporary Englishfollow the herd/crowdfollow the herd/crowdIMITATEto do the same thing that most other people are doing, without really thinking about it for yourself – used to show disapproval → follow
Examples from the Corpus
follow the herd/crowd• But Viroli is not one simply to follow the herd.• The only advice from Miss Doris was to follow the crowd.• I follow the crowd back to a coffee shop.• All they get is sad sheep for fans ... who just follow the crowd - try and be uncontroversial. 