Real point of a line up?

I cant figure out what the real point of a line up on ur car is. Number one unless u are sponsored y would u want to advertise someone elses logo? number two why would u want to let everybody know what u have isnt a sleeper the thing ppl are looking for. And third for theft reasons why let everyone on the street know what u have?

If u are wondering were this came from i was questioned weither i wanted a line up on my car when i got decals done.