Ask HN: I want to run multiple sites – should I have multiple corporations?

I'm wondering if there is a point to having multiple corporations for a single individual, if they are all basically just websites/blogs. The only thing that worries me is the apple/google store that will list a weird company name for the reader for each site that I want to publish.

Is this a real problem? How different/risky does the site have to be to justify it? What's your experience? Any links to anyone else dealing with this?