Poster Session Files

It would be nice to give the poster sessions a watermark, as well as have the ability to restrict them from being shown or downloaded in the files tab. 

There are times poster presenters or the convention as a whole has the requirement to protect the presenters presentation, but still give the presentation. I know poster presenters also sometimes share and distribute other files to attendees aside from their main assets. 

Having the ability for event admins to add a watermark to all post presenters files, as well as restricting the poser presentation files from being downloaded event wide would solve this road block.