Bit of advice for those who might be too naive and confident

Never get into a debate with objectivists and subjectivists about the basis of your morality, because they'll never accept your answer, repeating the same questions over and over: "how do you know your basis is valid?" "Why is your morality better than someone elses?" "Why aren't good and evil simply subjective constructs?" "How can man create a system with which to judge himself when not everyone will agree to it?" "If mob rule is tyranny of the majority, isn't mob morality the same thing?""Who designs the safegaurds against this?" Etc.

While those might not be particularly good examples of the kinds of questions they'll ask, it's not far from there methodology. Objectivists/subjectivists aren't all amoral, they just don't seem to know what morality to follow, as in they can't define it by any external doctrines, and claiming it comes from within makes it virtually worthless for all but for the person in which it exists.

The simple answer is to tell them to bug off or you'll amorally beat them.