Why we can't all just get along: Laundry Edition

If you point to a yoga mat in an otherwise empty dryer and ask if it's anyone's, and no one claims it, do not boot the yoga mat and everything from a separate, entirely unrelated dryer that someone else (me) was about to start. Do not, when the person you just booted says, in a pleasant tone, fine, whatever, use that dryer, take that to mean it's lecture time. (I explained that I thought she just meant the mat, but that it was fine, whatever, I wasn't annoyed, it was a misunderstanding, that's all, but this only seemed to get her more riled up.)

More to the point: do not begin offering unsolicited 'This is how to do your laundry' advice, as though speaking to a child, to a person your own age, if you yourself have brought with you to the laundromat a whimpering (if very cute) lap dog, whose leash holds it such that the dog has access to other people's clean clothes, not to mention such that the dog-leash combo makes it impossible to get one's laundry from Point A to Point B without tripping over the dog, the leash, or both.