What common mistake do developers make with Guarded, why does the mistake cause problems, and what is the safer approach?

What common mistake do developers make with Guarded, why does the mistake cause problems, and what is the safer approach? One recurring problem with guarded is applying it without understanding the boundary it protects. Passing the entire request object to Model::create() and relying on the database schema as the only security barrier. In addition, The guarded property can define attributes that should not be assigned through mass assignment. Safer engineering approach: keep the responsibility in the correct layer, use the framework's supported API, validate and authorize inputs, avoid hidden side effects, and verify the behavior with tests.