Most people follow others blindly just because they feel it safe to follow a large number of people. In some rare cases it might be right to follow the crowd, but in most cases this can be a big mistake. Actually there are reasons why we shouldn't follow the crowd blindly.
According to a study, people often follow the crowd when they aren't sure about the direction they should take. This means a large number of people could be following others without understanding what's right and what's wrong! This makes more people follow and as a result most people move in a certain direction even if it isn't right.
A man who wants to be successful always hopes for others' guidance and he usually follows the same path of most people, but the question this man never asks himself is: are all of those people successful? Of course not! If you want to follow a crowd, then follow a successful one. However, in real life you'll only find one successful person among hundreds of people, and that's why following the crowd makes no sense at all.
Most people act emotionally (感情用事地) without thinking wisely. If you always follow others because they're greater than you in number, then sooner or later you'll discover that you're taking emotional decisions you might regret later.
However, should we never follow the crowd? No. I'm not trying to say you should never follow the crowd, but instead I'm just asking you to think wisely before you take a decision. If you find others are right, there is no problem in following them, but if you have doubts about the direction they're moving in, don't follow them blindly.