How would they know even if that was official? Should they even trust you after you lied again and again?
I wouldn't be saying "Hey, this is Roger, the -insert job here-" I would be using pseudonymes. Just completely random things like....sk8trPW4D or something stupid like that. I would say things like "My friend, who works on so and such, says that this movie will feature this, that and the other thing."