Completely agree RE: people walking 'through' you - there were so many times that I was actually moving in a different direction to walk out of people's way and they still seemed to walk into me! Thank god that when I was with my heavily pregnant mate, people actually seemed to give a wider berth..
People pissing everywhere was absolutely disgusting.
Parents taking their massive buggies (and kids under 3 in general) to Shanghri La at night - absolute madness and (IMO) quite selfish. Take a year off.
People huffing balloons and leaving their sh*t everywhere.