Getting into the blind man's head 

Ha ha! And I'm glad I can make you chuckle this morning Bruv. And great question, but no; most visually impaired will not be disrupted or interfered when someone saying hello passing by. We've learned to not allow so much exterior audio distract us. But thanks so much for asking. if you just greeted them and said hello ma'am or sir, they will not find it disruptive

Yes I certainly do