The image filter that the WMF is planning is intended to be deployed on all Wikimedia projects. A lot of the design and discussion is about Wikipedia, and primarily English Wikipedia. I think we need to petition for Wikisource to be exempt from this tool.
http://meta.wikimedia.org/wiki/Wikimedia_Forum#Image_filter_on_Wikisource
http://meta.wikimedia.org/wiki/Requests_for_comment/Image_filter_on_Wikisour...