I don't think you will find many Freepers here who do not support controlled legal immigration. It's a great way to secure new talent and ideas much like we have always had in our history. The problem is the hoard from the south of the border who choose not to play by the rules. Thus creating the need for what you call "draconian prohibition". The ones who lose are the ones trying to get into the country legally.
H1B is destroying opportunities in the tech sector. Legal immigration is worse than illegal immigration. WE HAVE ENOUGH PEOPLE, people.