I've been thinking: you know those people who are absolutley obsessed with keeping their tents dirt free? I'm sure you've met one, the 'shake the tent out for fourth five minutes' guy, or maybe the 'one speck of dirt on your shoes and I'll murder you' guy. Either way, they grind my gears.
To add insult to injury, I walk barefoot as much as possible (shoes are only good for when your feet need a rest), and thus tend to track dirt into my ground-dweller buddies' tents.
But then I go back to my hammock, notably free from dirt, and I wonder why the neatfreak doesn't catch on...