I thought a year ago that Google will fix the problem of scraper and spam sites quickly, but 3 days ago a couple of my pages (original and unique texts) which ranked #1-#3 got replaced by a parked domain (with same title and desc. in SERPS like my removed pages). Another page is outranked by a single sentence taken from the page. I've posted the problem on Google's webmaster forum, but haven't got any help or answer. They have really big problems if they have a parked domain on #1-#3 for three or more days.