yes. its to keep you from getting sick by pushing out the toxins faster by having BMs.
i have teas only, lots of water, and sometimes some pulp to keep everything moving out. i find all my master cleanses so far to be easier this way.
i hear you on the public toilet thing. when i travel i pack rubbing alcohol wipes or in a spritz thing and some plastic disposable gloves. i clean the seat before using. wash my hands, still cover the stuff and hover. you can find those disposable gloves in the cleaning section of the grocery store or at a hair salon supply place.