It is a lot easier than you'd imagine to become invisible.
Take me, for example, I am disabled, white, elderly, and unemployed. I tick ALL the boxes for being ignored in the UK, unless the government wish to impose cuts. Then, the elderly and disabled become very visible.
The title on the cover is a book I may write, I need to decide between my life as a disabled person and the changes it has forced on me, or to edit a series of short stories I wrote about a disabled writer at the end of last year - yes - the writer is based on me.