Its your car, feel free to cut it up all you want. Just remember when it comes time to sell its all ways easier to sell a car that is closer to stock then something thats been cut up and modified to your personal taste.
All so please remember, you asked for opinions. If you dont like those opinions theres no need to get nasty.
That works both ways though guys, If you dont like what hes doing to the car, No reason to jump on him and start arguments. Just ignore the thread.