tangor - 6:44 am on Dec 10, 2011 (gmt 0)
Didn't say it was hard. Just a remark that it is different. check all the historicals here at WW wherein Frames are indicated as anathema to search engines (suggesting scrappers don't like them, too). Just reporting that particular site does not require the same DMCA as all the others, by 90%.
I don't think WHY, just reporting FACTS in this particular case. As for the scrapers, they are there and dealt the occasional DMCA, just happens to be a very small, narrow, generally useless sort of niche. :)