Im sure you were unfairly banned. All of those who are are unfairly banned.
As for the content...its the internet and rules DO apply out here. What is created by a person or persons IS THEIRS to determine where its downloaded from, sent too, etc. When I take my pictures and upload them, they are MINE. Not for anyone to use for their own gain without permission and a clear stating of what its being used for.
Theres also just common decency for someones work and their request. If you created something and only wanted it to be downloaded from your site (if you had one) I wouldnt go behind your back, download, then upload here or somewhere else if you requested it be downloaded from one source.
Files, content, pictures, etc. CAN be exclusive to a website.