I am with @Johnnythefox, never leave the house without my baseball cap on, with the double bubble protection of the fact that i'm only about 3 n a half high on my wheels so no bugger can see me, as in my face etc unless they bend down.
So thinking about it (thanks Op for getting my brain to work) the whole 'chair' thing works as a security blanket, most folk don't want to look too closely for fear of realising their own mortality/breakability in a split second of the randomness of life, i use the sort of chair that folks equate to some poor bugger having their life changed in a car accident. Or they don't look for the multitudes of other reasons people find it hard to interact with the likes of me.
So yeah add a hat to that & i am safe-ish to go out & about. Thanks Op