Sheep are a very messy organization, they usually run blindly together, but once a sheep moves, other sheep will flock to it without thinking, no matter whether it is wolves or grass in front.
Therefore, the "herd effect", which is what we often call herd mentality, can easily lead to blindly following the trend. At present, somewhere, there are groups who blindly follow the trend. These people will certainly be punished, but they have killed some innocent people.
Social psychologists have found that the most important factor affecting conformity is seeing more people. There are many people who persuade, but few people who don't, so as long as everyone does this, many people will follow suit.
The most typical is business. Pork is particularly expensive this year, and the number of people raising pigs may increase next year. Where there are benefits, everyone will go. As for whether you can make money, it depends on luck.
In today's society, the media spreads very fast, so there is this herd mentality. The media often plays a leading role.
A piece of news has become a fact recognized by the media. If you fan the flames a little, it may become so-called public opinion, and everyone may criticize it online. Such things are not uncommon now.