A bit worrying that and I hope a mod can clear this up. All content presumably includes images.
I would interpret "free of copyright" as not using material of a third party who "owns" the copyright.
As I understand it if we post a picture on AVForums than that instance of the image becomes the property of M2M, and as such they can delete it. This does not necessarily mean that copyright has been transferred to M2M and as such does not give them the right to use the image or alter it without the copyright holders permission.
But, it is a while since I was involved in copyright issues as part of my job (meaning I might be talking out of my

), and this does need to be cleared up.
Thanks for raising it and nice to see someone is on the ball at this time of the year

.