Unfortunately, the only way to block spammers, hackers and content scrapers is through a mass banning of IPs. The problem with the Chinese hackers is so severe that it is literally taking thousands of servers down while an attack are being launched.
The latest WordPress Brute Force Attack is one of the most difficult to block because it consists of hits from over 90,000 IPs on infected servers and PCs around the world.
"Democracy is two wolves and a lamb voting on what to have for lunch. Liberty is a well-armed lamb contesting the vote." -- Benjamin Franklin