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Many believe that the sites are used exclusively for erotic stimulation. While this may explain some of the sites' commercial appeal, there appear to be other motivations as well. The tone and content of several on-line discussion groups that cater to child modeling site subscribers reflect an almost parental interest in the models' welfare. Moderators routinely ban participants who make lewd or even disrespectful comments about the child models. While the subscribers' interest in the models might not be easily explained in familiar ways, they do not generally appear to pose a threat to the models' safety. There have been no reports of Internet child models being stalked or harassed by customers, though they have been stalked by news organizations.