so who decides what is "normal"?  who am I to decide that clipping one's horny fingernails on the bus is inappropriate?  who am i to pass judgement on someone who sneezes snot into the aisle?  who am i to feel annoyed and repulsed that someone is painting their nails and filling the bus with nail polish toxic fumes?  riding the bus has me thinking about boundaries.  who defines them?  polite society used to define what was okay and what was not.  polite society defined those boundaries.  what happened to polite society?  how do I, who believes in polite society,  exist in a bus world with others who do not know from polite society?  do they NOT KNOW?  maybe they just don't CARE.   i never had to think about these things when i drove my own car to work each and everyday.  now i have to think about these things.  is there a miss manners for bus riding?  help!