Big business wants its ads to get to the highest number of people for their buck and will pay to ensure that, so unless your riding a wave of total public support they will not care about their public image if they perceive it to have a marginal effect overall.
If you dont like what they write dont read it or pay for their services, notify those who advertise through them that you will no longer buy their goods and, if you feel they have broken the law, take legal action.
Edit: I should add, good luck.