As Blogger continues their efforts to classify and remove abusive use of Blogger resources, they are adapting and sharpening their fuzzy spam classification process. The sharpening enables them to righteously classify more spam blogs, and to spuriously classify less genuine blogs.
This improvement is good - to everybody but the would be publishers of hacking, porn, and spam content. The victims of Blogger's success - the spammers - are being forced to change their techniques, and to outsource their controversial content to other sites.
The spammers are going to both improve their technique, and to double or quadruple their efforts. Spammers use other peoples computers to do their work - so quadrupling their efforts simply means using more bots, and sending out more spam. That's a simple, low cost solution.
This month, we have activity in BHF: How Do I? and BHF: Something Is Broken, possibly intending to probe the nature of the fuzzy classification process. That's one strategy to improve their technique.
If you understand fuzzy spam classification, you'll know that trying to predefine the process isn't relevant. Fuzzy spam classification will adapt, as spam publishing adapts to continually mimic legitimate blog content.
Your blog needs to contain real material, intentionally designed to inform and interest your readers. If you're trying to adapt porn or spam to services outside Google, and circumvent Blogger TOS, you need to plan for spam classification of your blog. If you're building a personal blog and using typical porn / spam techniques to SEO your blog, then plan to deal with spam classification and the well known and hated 4 step spam review process.
If you simply have a genuine Blogger blog, and have been reading the FUD generated by a few confirmed spammers who have been expelled from Blogger, you might want to read about the numbers behind Blogger and the spam problem.
Recently, Blogger improved the accuracy of their spam classification process. Instead of a 50 / 50 righteous to spurious appeal ratio (to which I refer, in the FAQ), we are currently seeing a 20 / 80 ratio. That is 1 personal blog, falsely accused of hosting spam, to every 4 spam blogs, initially locked and subsequently deleted after appeal). If your blog is genuinely personal, and you are not a turkey, your time will be better spent publishing content in your blog - instead of listening to the fear, uncertainty, and doubt about fuzzy spam classification. And we should understand the paradoxes involved in spam interdiction.