Active Rain Community Guidelines
The full ActiveRain Community Guidelines can be found here. Several of the guidelines speak to me and are part of what kept me using AR.
I am a firm believer in Creative Common License which allows reuse of original material but only with the permission of the creator. Active Rain allows for re-blogging. Which takes a person content and allows someone to re-post it if they make a longer comment about the original post. The original content still recognizes the original poster. I like re-blogs but I don't do it often because I think readers many not understand it is a re-blog.
Images are one of the most common things that are taken without permission. It is too easy to steal them but its is wrong. The other problem is what to do once you find a stolen image. You can sue for damages but how much time are you going to spend. Damages can be very speculative.
One thing you can do is "review" a post. Which means you can take a snippet and refer back to the full post. This allows you to expand upon what the orginal writer has said and put your own spin on it.