You could turn off blog comments on your business blog but I agree with Chuck Crawford. Having blog comments is a good idea. He gives at least two reasons why.
First, comments give you free content. This is good from a search engine standpoint, because the keywords on the comments may help you rank for more search terms.
Second, comments allow your blog to turn into a community instead of just you speaking on your soapbox. Community can’t happen unless people are allowed to speak. And community is what many people are looking for on the web.
I’d like to add two more reasons.
As your blog increases in traffic, your comments will increase. This will improve the perceived value of your site and you’ll gain repeat visitors. Social proof is a powerful force. People will think, “Hm. Many people are commenting. It must be a good blog.” But you need to allow comments for this to happen.
Finally, you can get great feedback in the comment section. This feedback is valuable to improving your site, products, and services.
If you’re worried about comment spam, there are programs that can help. For example, Akismet works really well for WordPress blogs.
And if you don’t want certain types of comments (like hateful or off-topic ones), you can add a comment policy. Just make sure your readers know about the policy. I would place a link to it near the comment text box.