It seems that every few days we see another story about employers firing or suspending employees for comments made of Facebook or elsewhere on the web. It's a worrisome trend.
Given that, you might think that if a company finds your resume on-line, before their recruiters call you up they might Google your name + their company's name, and see if you've bad-mouthed them. For example, I'd expect someone from Amazon.com to Google '"Tom Swiss" amazon' before calling me about a job, and see on the first page links to my post, "Amazon must be destroyed", where I write about my loathing for these patent-abusing pro-censorship bastards, and then cross me off their list. (BTW, such a search also finds the MP3 downloads for my tracks for Words on War.)
Apparently not, though, since I just got a call from an Amazon.com recruiter. (I was polite.)
I'm not in the job market right now, and my resume page even has a link explaining this. But since my resume has been at the same URL since, IIRC, the late 90s, I guess it comes up fairly high on Google searches.