Public feedback boards are a great way to gather feedback. They are an easy way to collect ideas and promote a sense of inclusion with your customers. Unfortunately all too many products in the market today only offer public boards with up-votes. Up-votes appear to be a great idea, but on closer study, promote the wrong kind of feedback. Feedback that is low value and could be detrimental to your business.
More votes does not mean that idea is the best (or even good) for your business.
Up-votes do not tell you much, such as if the feature will even be used!
You post an idea for feedback, the idea sounds great and receives lots of up-votes. You build the idea. No one uses the idea. Why did this happen?
High vote ideas can sit at the top of the list for months or even years when they don't fit into your business goals.
Your job as a business is to add and retain customers. Many feature requests are cool ideas, that no one actually cares about. In other words, they are not important enough for most users to care enough to buy or leave.
Sometimes popular ideas are just not feasible. They may not fit the business model or there may be technical challenges. In either event, you will need to shut down a very popular idea.
Posting feature feedback as votes is the wrong approach, this is not a poll or election. We are looking for the value in the feature and how it will be used.
Customers will feel disenfranchised when high vote ideas are scrapped.
High votes attract interest. Everyone wants to see the popular ideas. High votes draw in attention when you would get more value if the user checked out other ideas.