This statement is not really about internet piracy, but about two moral positions. The piracy is kind of beside the point, isn't it?
The first moral implication of the statement is that any act can be considered moral or morally appropriate as long as it is seen as being accepted by a majority.
The second moral implication of the statement is that "it's ok to do anything as long as you don't get caught". Though the subject is ostensibly digital copyright infringement, the moral statement being made has little to do with the type of transgressive act and has more to do with the principle that ACT X is only morally wrong if ACT X is discovered, i.e., if you are caught in the act.