About hiring live users... it will be a slave hiring, without paying money.

Here is how it works, just one of these 2 options:

1- Spammers automatically create a blog, crawl the submitted articles here to their blog, and wait for a real user to comment on it, and then submit that comment here.

Or: 2- Spammers would create a bot that crawls the submitted article, submit that article to any public social news website, and wait for real users' comments, and then automatically submit the real users' comments here, and you will think it is NOT a bot/spam, but it is.

EDIT: This is something that can be implemented these days, not after a decade!

If this happens, will you think that this is a bot or not?