Therefore: when presenting content which is very close to an existing source, always add a statement in advance about its origin.
Or if they do not want to add a statement in advance about the origin of the existing source of the information they want to post, they can copy the entire existing source and put it in a quote box in the forum, then the orginal poster can now include their own notion or opinion about the source, in addition to what discussion they want to bring up, that is even a better way to motivate and induce conversations from other members of the forum, and it won't look anything like a "merit grab presentation" because the copied text is clearly in a quote box, and easily means it isn't the Op's.