Why won most IRCops help warez or porn channels?
Personal ethics is the reason. Even though Undernet is an unmoderated medium and does not monitor or police the activities of its userbase (outside of those who are actively abusing resources), no IRCop is required to help any channel, especially a channel that goes against his or her principles. If they think warez trading undermines the software industry, or porn is degrading to women (or dogs, or whatever) the are certainly not under any obligation to give such channels ops or help of any kind. Mp3-trading channels usually fall under this category, as well.Also, remember there are laws that forbid trading copyrighted material, and everyone (even the mighty IRCops) has to obey the law.