No, I definitely know it when any part of my bike is making noise. Chain squeak in particular is like nails on a chalkboard, except that nails on a chalkboard don't really bother me but a squeaky chain drives me crazy (it's a short trip, though).

I've often wondered how rude it would be to offer a fellow cyclist some chain lube.

There's a group of young guys I see around the local regional airport who are always riding around on cheap X-mart bikes and their chains are always squeaking. My suspicion is that they just think their bikes are noisy because they didn't spend a lot on them. I'd really like to tell them that a $3 bottle of chain lube would fix the problem, but I don't quite live close enough to Portland to be unable to control the urge to give unsolicited advice to complete strangers.