You just need to let people know.
You don't even have to proactively go into @steemcleaners, @steemflagrewards, etc. A simple header/footer letting people know that's where you are getting stuff from and that you are the original author would do.
Anyone who flags you for plagiarism after that is an idiot who doesn't read.
@enforcer48 you were flagged by a worthless gang of trolls, so, I gave you an upvote to counteract it! Enjoy!!