No brand should underestimate the importance of its digital reputation, especially in this era of Google-first, buy later culture, not to mention the prevalence of review sites and social recommendations.
Although it is practically impossible to completely avoid negativity (just look at the comments of any YouTube video), it is how a company controls its surveillance of and response to these mentions that will help determine how it is perceived. By confronting issues as they arise, the impact that negative mentions online will have can be contained, helping to prevent a snowball effect from occurring.
Ensuring a brand is seen in the most positive light possible is essential for establishing and maintaining trust for customers, regardless of what the brand sells.