Not long ago I was annoyed to discover that some sack o' suds had been scraping my RSS feeds to get content for his site. While I did send him an e-mail demanding that he stop doing this - which he ignored, of course - I didn't pursue it any further. I was very busy and just didn't have the time.
Curious as to whether he was still stealing my content, I typed the URL of his site into my browser and was taken to an "account suspended" page. So, it seems likely that someone else he'd been plagiarizing was a bit more assiduous than me, and sent an official complaint to his web host.