https://www.youtube.com/watch?v=t9zOuqYk1ig
You can clearly see the loopy "Lulu" at 0:38, and the mechanics of his signature is evident from the footage.
Also the fact that Luka is going out into the cold weather to sign autos definitely goes against your theory that he is committing fraud.
Another loopy Lulu:
https://www.youtube.com/watch?v=smsnHTyYDE4
More here:
https://www.youtube.com/watch?v=iAqhE4QC0wo
https://www.youtube.com/watch?v=GYPPjTiK38Y
This thread is an embarrassment.