I strongly believe that companies should censor dissenting opinions. Censorship plays a central role in the control of speech and other forms of human expression. Therefore this should adapted by the companies. It is most commonly applied to acts which occur in public circumstances, and most formally involves suppression of ideas by criminalizing or regulating expression.
Public Relations methodologies and strategies have never been stronger or more effective. That's why you don't really hear about them— because they work.
Do you know how McDonalds famously responded to the first "Hot Coffee" lawsuit? They began a international smearing campaign and introduced the idea of frivolous lawsuits to the common sense. The thing is– the "Hot Coffee" lawsuit wasn't frivilous in the least. It was extremely appropriate. But this is an example of Corporate image manipulation, which you've referred to here as dissenting sensorship/
Censorship is supression. Supression indicates fear... What do the censors have to fear? Well, they don't want you to find out, that's why they censor things.
Censorship is one of the most oppressive acts possible for a human to commit.
If you believe censorship is ever appropriate, then you do not respect humans.
Censorship protects nobody from anything, it just deprives the world of ideas.
Companies should not censor dissenting opinions, but they will do so. Laws in the past few decades have favored companies over individual freedom. An employee does not have a right to privacy while on the clock. As long as it is in a companies' favor to do so, the entity will continue to censor free speech among employees.
Censoring opinion will do much to stop the spreading of those idea and in fact can also make them more powerful. When someone is censored it tends to make that idea more powerful and reach more people. And when a voice is silenced it doesn't do much to stop that idea from spreading, but what it does do is bring attention to it so that it spreads further and starts conversation.
It is also against the principles of free speech which is something much loved by many. When people see a company ban someone of its site, they see the company in a bad light because they get the impression that they don't believe in freedom of speech. And also companies can be very bias in who they choose to censor which impact greatly what they choose to censor. The freedom to say what you want has lead the world into a better and more tolerant place and this makes the lives of everyone more fair and happy. Censorship is a dangerous thing and we as a society will miss out on some of the most important conversations if we refuse to allow people to express themselves in a free market place of ideas. And in this the best idea will always win in the end to create a better world in the future.
Lastly, cracking down on liberty of words is just bad business. It historically has always made the product of the business less attractive and hurt the business. Companies should not go against their interest by censoring opinions of others.
Companies should generally have a sense of unity among their workers. However, conflicting opinions can breed new ideas and discussion. Censorship should usually not be allowed in the workplace, much less regarding someone's opinion. Preventing freedom of speech in the workplace is not a good idea, and promotes an overly-controlling environment where workers feel restricted.
Ultimately, a person has the right to say what they think. It is impossible to please everyone. Even if a person were just handing out money, someone would find something or someone to criticize for the way they were doing it. A company should work on producing a good product and then leave the rest to public opinion.