It&#x27;s disappointing, but to be honest, not all that unexpected.  A company blocking links to competitors on their service is pretty common, even in the world of social media and instant messaging.<p>Which raises an interesting point with these services.  At what point is it &#x27;wrong&#x27; for a company to control what people can link to on their service?  This example is pretty tame given it&#x27;s merely not being linked, but if the link had been removed altogether, would that be &#x27;unethical&#x27;?