Watch for People Who Try To Sieze the Moral High Ground
An easy way to get the silent assent of your detractors is by attempting to seize the moral high ground without their noticing. I see this tactic used all of the time in political discussions.
One of the things you learn from Objectivism is to identify and explicitly question moral premises of arguments that are presented to you. It is good inoculation against exhortations to honor "Social Contracts" you never made.