The definition of leeching here is: completely copying someone else's post, including images and text, and reposting with your own file link.
Not everyone does this. So your point is moot. And as I said before, don't assume it's all warez and that we are pirates, unless you have gone through and verified EVERY uploader's contents.
Most forum/blog etc operators are aware of multi accounts and usually ban them when found as well as some that are multiposting the same shares over & over so any spam-fests are unlikely to happen.
Obviously it wasn't the case for giang_coi because he was doing it for a very long time on a pretty large scale. It was only yesterday he was detected and banned from many forums.
And forum mods/admins do rely heavily on reports from other uploaders.
Regard uploading stolen content...what would you have me assume?
Just don't assume anything. Simple.
Perhaps you are right that it doesn't hurt the filehost but I still believe it's better to be cautious. You can't predict what will happen in the future and laws always change.
You can keep arguing, but at the end of the way, it doesn't change the fact that giang_coi was breaking multiple forum rules and it was beneficial for everyone that he was finally uncovered and banned from most forums.