The Private Army That Protects L.A.'S Rich and Famous

Where is the line between a minimally-researched article, and paid advertising?

> Private security firms have been around for decades, of course, especially in L.A.

Vs. Wikipedia: "Pinkerton is an American private investigation and security company established around 1850 in the United States by Scottish-born American cooper Allan Pinkerton and Chicago attorney Edward Rucker as the North-Western Police Agency, which later became [...] At the height of its power from the 1870s to the 1890s, it was the largest private law enforcement organization in the world."