Barefoot Traveler

I am reminded of a flight I recently took where a guy entered the bathroom of the airplane barefoot. The same bathroom where earlier a woman exited to tell the flight attendant that there was some sort of liquid all over the floor. Somehow the man's misplaced familiarity was unwelcomed. We were afterall travelling together in a sealed environment where I believe a bit of discretion would be advisable. I felt guilty slipping my socked foot from my shoe for fear of upsetting my fellow travelers. This man felt no such social barriers and freely walked the aisles barefoot.
Is that freedom or the precursor to a nasty ringworm infection?