This is pretty much the reason why I do most of my actions, If an action is not illegal, therefore it cannot be immoral. The best argument supporting this theory is derived from basic law. If an action is considered immoral and inherently wrong, then a law would be made to punish the ones that commit the action, so therefore if an act was considered immoral then a law would be made to punish him. Thats why I can laugh at funeral and not get in legal trouble, any other trouble in meaningless and you can just walk away from it