...participate for the love and the general weal of the system. Here is realopinion.com's registration rules:
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http://www.realopinion.com/realboards/How do these differ from DU's rules? It may be just a general ignorance of the proper etiquette. You might want to send a copy of the DU rules and ask if they would consider adhering to something closer to what we have here. If that fails, then you can always monitor what they do and when you find infringements, post open grievances of the site with the appropriate links. If that doesn't get them to stop their plagiarist practices, keep records and sue the bastards. It may be a free market, but that does not give license to steal.