True, but people steal images from tons of other sites too.  It is one of the downfalls of uploading ANYthing .... someone, somewhere, might copy/download/steal it.

Personally, I just don't think it is Renderosity's job to watermark anyone's images, that should be left up to the individual. 

Some people dream of worthy accomplishments,
While others stay awake and do them.

I am a dreamer