A blackhat method is something not allowed by the terms of the company you will receive the traffic/revenues/leads from. Autoblogging is not a blackhat method. It's like asking. Is driving a car illegal? No, if you have the license. No, if you drive within the road code. Within the limit etc. Just don't do it if you're not sure.
Its not blackhat. If you scrape RSS feeds from websites and autoblog it without their permission its illegal, but not "blackhat" as its not forbidden by Google to create/rank such a website. Autoblogging CAN be completely legal if you own all rights on the content you publish.
Absolutely not! Ripping off and automatically posting stolen content is well within the google guidelines, hell! Even Matt Cutts recommended it for people too lazy or cheap to get their own content. Auto blogging will be the route to success in 2016, mark my words.
If you re-use content in 'permissible' ways (the site is set up curation-style, or pulls articles from article directories (with links and resource box intact), autoblogging isn't blackhat. You can even install a plug-in to load up a bunch of new articles in a WP blog, such that they get published at intervals you specify. In essence, you could upload 40-50 new articles that would drip-publish over several months or years, without further intervention by the blog owner.
Unless you're rewriting the content it's going to little to no SEO value as Google knows it's not unique and knows the site that published it prior to you doing so.
Not necessarily. If your not using google for your traffic then apart from copyright issues you will make money.
