There is a time when it becomes apparent that you're just using a phrase like that, not in the defense of legitimate liberties, but against any and all democratic decisions that happen to conflict with your ideology. And that's dangerous, that is the more serious threat to our republic than any paranoid fears about encroaching government. Even if it doesn't eventually devolve into an excuse for an undemocratic seizure of power among future leaders and a permanent end to the republic, overuse of the term desensitizes people to it. Libertarians are the boys who cry "tyranny!" Eventually, no one is going to believe you anymore.