Not necessarily. You would be amazed by how much time, energy and resources these groups put into overcoming systems.
Companies have tried to make it more challenging for a VIN to be removed or replaced on a vehicle, but there have been situations where a vehicle was recovered and law enforcement found that this organized crime operation had a full VIN manufacturing facility where it was replacing the VIN with a highly convincing new VIN.
You have to always try to stay one step ahead, but I wouldn't underestimate the money and resources these groups put into replacing VINs.