Oh, no, he's most likely an actual shill.

Wasting his time on a site where 5 to 10 people read the posts?

To what end?

Many of which have named comprised of two capitalized common words.

Can you show me half a dozen examples?

The capitalization is to mark the new word. I find the underscore awkward. I chose my username because I tend to post a reply when I see a comment that I disagree with.

Last year they all ended their sentences with the phrase "They Scream", which I assume was a translation error from a Chinese exclamation.

The relevance of this to me is what?