Answers which are only useful in pirating software, such as a response to "How do I apply [group]'s crack to [game]" should not be given, as they are of no realistic use to non-pirates.

However, questions like "My copy of [game] crashes when using Unity but not Gnome Shell - oh and by the way it happens to be pirated" should be answered, because the problem and its solutions will probably apply just as much to non-pirate-copy users as to pirate-copy users. They are not asking for help with the actual act of pirating and the answers should be useful to other non-pirates who have similar problems. 

Similarly if someone asks "How do I copy files to root directories, because I want to crack a program" you should tell them that they can use 'sudo nautilus' to access the whole filesystem, but warn them that the use they are planning is unethical and illegal. Your answer may still be useful to others who stumble upon the question who want to use the same information for non-illegal purposes.