No company owns the rights to airsoft. Airsoft is just a general term for an air rifle that shoots plastic pellets. BB rifles also shoot plastic pellets, but a true airsoft gun uses a more...
The company that owns the engine behind PHP is called Zend. Find them at Zend.com The language itself is controlled by the PHP Language Group. Licensing fun over at the PHP homepage: see related link...
Do you mean a website or the language itself? The language, which is part of Visual Studio, is a Microsoft product. The website visualbasic.net appears to have been placed on hold at webhost4life.com.
It would not seem to be unethical or illegal, but it does appear to be rather counterproductive. The purpose for buying stock in a organization is usually for investment/profit. Owning a business...