Sorry to do this mate
Roy didn't create this forum from scratch... He downloaded it from a site that provides the forum script. Roy has then worked very hard on it putting in a lot of time and effort to get it how he likes it./ The original creators of the forum are listed at the bottom of every page complete with copyright notices ie: vBulletin.nl
Where it is possible to get confused is the hosting. A lot of free forums are available that are what is termed "remotely hosted" and the forum is on the owners servers and you link to it from your website as if it is yours. However the owner who hosts it and may have nothing to do with your website is where the buck stops.. he owns it and is responsible for any material stored on his server.
Roy has his own server and hosts the forum himself.. therefore roy is the owner and host and the forum belongs to him.. we call the host the providor...Therefore he is responsible for content stored on his server ... It doesn't matter who writes something. the person storing that content is the one responsible.
Hope that helps