I won't make any big judgement calls about international students based on observing my few friends. But hey, it does make me believe that international students are less aware of the consequences of things like plagiarizing. I think they are a little behind on it. For American students, we went through the "dumb phase" of plagiarizing in 6th grade when I remember 90% of my class using the same one source for an assignment forcing the teacher to give an hour long lecture on plagiarizing. She also canceled that assignment. International students, unfortunately, don't seem to have gotten that lesson before coming here. Really unfair for them -- but a win for American education(rare as that may be).