I wrote scripts for my blog and still receive spam, so it's not only standard software that's vulnerable - they definitely use some heuristics or otherwise anal

I wrote scripts for my blog and still receive spam, so it's not only standard software that's vulnerable - they definitely use some heuristics or otherwise analyze blogs manually, one by one. Also, I see poor English (I mean, very poor English, not like mine) in spam posts, which means it's been outsourced already.