Yes, as long as there is no credit given, Steemcleaners will handle it. They don't care if the source is Mickey Mouse, as long as the author is not claiming it as his own! The real problem is that citing a wrong source is also plagiarism, but plagiarism is not illegal. 99.9% of the time copyright is being infringed, which is illegal! We should be taking copyright infringement more seriously, as one of these days we are all going to suffer because of someone else's greed!