Many comments here mentioned free speech though constitution only stipulates that congress should make no law abridging the freedom of speech. Surely a person is within his rights to reject such protest happening in his own backyard when it comes to the right to assembly. Why can't Apple, a private company, forbid an app from its own appstore? It is a matter of monopoly, if Apple, Google and Facebook alike are acting like market regulators, since they together owns the market itself when it comes to mobile app consumption, which is traditionally something only the government is capable of doing.