Dear commuters:
Please take the time to wash your hair before boarding the buses -- preferably with dandruff control shampoo -- as I don't appreciate you sitting in front of me, leaning your heads back as far as you can, and powdering my lap anew with off-white scalp flakes every time the bus lurches into motion after stopping for whatever reason. It's revolting and unsanitary.
Thank you for your attention to this matter.