TV's "Monk" and hidden BNSF logos

[Ralph]

For those of you who are familiar with the USA network's show "Monk" about the detective with OCD, the recently run two part final episode included a scene in which a suspect was being chased through a freight yard. The locos and many of the cars were obviously BNSF equipment but every swoosh logo was covered with just enough graffiti to cover the letters BNSF. The one exception was a front end shot of a loco that read "BVSE". I don't know if coverage was actually applied to the equipment or i it was somehow photoshopped into the scene. The consistent efforts to cover the company logo made me wonder if it was the railroad's policy or if the TV network didn't want to offer free advertising for the railroad.

Any thoughts?

Ralph