Where ever we go if we are trying to copy anything from other's work and claim that is ours or let say we do a plagiarism then that's a bad Idea or habit even in our real life interms of plagiarism then it's not good to claim others work. And in the forum as you can see there are many user got banned because of plagiarism it because it's prohibited there in our community and if they are caught then permanently banned are weaving. While Scammers they Got only red tags but not 1 but many red tags so that other user who encounter that account is a ware that not to deal with that user because it's too risky.
That is why plagiarism is strictly prohibited because there are already rules in this forum and even as discussed here that staff/moderators can take that action because it is proven and verifiable in reports or in this
thread.
Meanwhile, to prevent scammers from returning to individuals because the forum is not moderated so it is difficult for them to take that action, but in essence it is our responsibility and risk for us with scammers, then it is up to us how to prevent it, if a project has been cheats all you have to do is avoid and tag them red.