At least, I hope its not an April Fool's joke. It looks more like someone's lawyers go up to 11. From the Slideshare API Terms of Service.
(iii) use the SlideShare APIs to operate nuclear facilities, life
support, or other mission critical application where human life or
property may be at stake. You understand that the SlideShare APIs are
not designed for such purposes and that their failure in such cases
could lead to death, personal injury, or severe property or
environmental damage for which SlideShare is not responsible;