An individual or organization boycotting or promoting a boycott of a person because of that persons opinions on a social or political issue is not a violation of that person's “free speech”. Free speech means that the person has the right to say what ever they wish, but not that those who find what was said offensive or harmful cannot express this by boycotting and encouraging others to do so.

Financially punishing someone or an organization because you find their views offensive and/or their actions harmful can be a good way to change what they say out loud or do, even if it does not really change their hearts or minds.

I won't eat at a McDonald's restaurant because of the low wages they pay their workers and because this deficit in wages must be made up by social programs paid for by taxes. I would like to see them go out of business if they do not reform that.

Ender's Game is unlikely to matter to me. I don't go out to see films that often anyway, and I'm still waiting for Gravity to come to the one theater that is close enough to where I live.