Should you allow commenting on monetized blogs?

You hear so much information on the web about how to make 100's of blogs just for Google Adsense or slapping affiliate ads on them. One of the main problems of having 100's of blogs to do that for you, is the problem of commenting on your blogs. Do you allow it, do you moderate it, or do you disable it? Here is my suggestion:

First you must realize that the advantage of a blog rather than a stagnate website is the fact that people can leave comments on your posts. Often it is not the content of your post that gets attention but the comments that are left. How many times have you read a news story on MSN only to find yourself reading that long line of comments left at the end of the story? Comments are also a sign of a blog's popularity. The more comments, the more readers.

That being said, there are times when you don't want to have comments left. If you run several blogs that you just want to write a post on them maybe once a month to keep them active and have them strictly for Adsense then you probably want to disable commenting. I also have one blog that gets its fair share of comments but when a blog post is over 3 months old I go back an disable the commenting on them. The reason for that is the fact that comment spammers will commonly spam old blog posts because those posts are indexed in Google and might give out some link love. By doing that I keep the free credit scores and Viagra comments to a minimum.

Another thing you might want to think about is if you do paid blog posts, do you want your readers to mention negative things about your sponsor? Or worse yet, leave a comment that you have sold your readers out? Most people won't bother to leave comments like that on a blog, but you do get those trolls that just like to stir up trouble.

Lastly I would like to mention that I NEVER, but NEVER have any of my blogs set on automatic publish of a comment. There is a program out that will insert malicious script into a blog via those gibberish scrambled comments which is something I had not heard before, but I am glad I moderate comments.