One major disadvantage of public opinion is that

One major disadvantage of public opinion is that a vocal minority may claim to represent the majority. In some cases, a small group of people may express their views loudly and forcefully, giving the impression that their opinions are shared by the majority. This can lead to a situation where the government or other decision-makers make decisions based on the views of a small but vocal group, rather than the actual opinions of the majority of people. It can also create a situation where the views of the minority are given disproportionate attention, leading to policies that do not reflect the interests or concerns of the broader public. This can result in a lack of representation, and may harm the democratic process.