Geez man - way to generalise! Just because someone was investigating some options doesn't mean he's going to go out and break the law 10 times a day.

In an attempt to add some value to the thread I would suggest that the advice already covered here is extremely sound - the best additions you can make to your car are those that can be done from the factory - there's far less margin for error and you also are warranty covered in the event of any problems.