Autoblogging shouldn't be a problem. A lot of people who use original posts often write dozens in advance and use an auto poster. Additionally, if you have a blog that is crawled frequently, you can often get someone else's article or content indexed before they do which will give you unique content.
Just make sure:
1. All your blogs are on their own domain
2. If you have multiple blogs, don't link them to each other if they all have the same Adsense ID. DO NOT make thousands of blogs.
3. Do not blast dozens of posts to each a day. 10 a day max (even that might be pushing it). And SPACE THEM OUT.
4. Make sure ALL your posts are relevant to the blog topic or categorized under a generic category AND are readable in their respective language. Nonsensical posts, when reviewed by humans are an automatic ban.
5. Make sure each one has a unique skin/theme
6. Make sure you do not have excessive foul or sexual language (check your tag clouds often). I had a dating blog that all of a sudden when to public service ads and when I removed the sexual content from posts and tags, normal ads starting getting served almost immediately.
7. Get quality one way links from sites that are similar in theme to your blog (this is huge). Not just pingbacks and comment links, in content.
8. Add unique content/posts at least once a week. Even if it's short and just one post.
At the end of the day, Google wants relevance so that the visitors on your sites are targeted to what their advertisers are promoting. Those people are obviously more likely to convert better for advertisers because they arrived at your site searching for the topic.
Google has more targeted ads than they have space to display them. They need quality sites.
If advertising tracking adsense see that the people coming from your sites are basically junk and never convert, they can simply file a complaint with Google and if enough of those complaints come in, they will can your site.
This has nothing to do with duplicate content and everything to do with relevance and quality.