I don't. I owned up to changing wet nappies in the bassinette on a flight, but am constantly dumbfounded by friends/relatives setting up a stall in my living room (or next to them on a seat in a coffee shop) and carry on merrily with pooey nappies, despite my offers of changing tables, wipes, sinks for hands etc etc.
Thsi was touched on briefly in the airline thread, but it really gets to me on a weekly basis, so am just wondering if IABVU, when usually I'm the most slovenly of people.