So her physical attributes make her special? She should be allowed to do something that interrupts other people, because she is old and blind. While most people give a lot of leeway for special attributes, it doesn't mean that she is entitled to that leeway.
What does me 'growing a pair' have to do with anything? How am I a 'pussie' for not being please to be intertupted by someone trying to hand me a tract while I stroll through a public park enjoying my solitude?
Did you enjoy the Hare Krishna's interrupting your trip to your gate at the airports? Or dropping what you are doing to answer your door while the Jehova's Witness tried to convert you? How about the calls on your cell phone to sell you insurance or an extended car warrantee?
Look up the word unsolicited.