Koen Verbeeck (6/23/2014)
Maybe the editorial process could include something like "copy paste a sentence into google and see if something turns up".It will not catch everything, but at least the pure copy/paste plagiarism will be eliminated.
There seem to be loads of plagiarism finder tools online like this one:
http://www.plagscan.com/seesources/search.php?
Try one.