Could your Grandmother use Steemit.
To use steemit
We need a
Private posting key
Private memo key
Private active key
Private owner key
A master password
a public posting key
a public memo key
a public active key
and a public owner key.
Then we need to download a file containing all of these on to a hackable computer
and use them for different tasks by copying and pasting them
rendering them vulnerable to keyboard
Then it seems to get exposure you must somehow work out how to use one or two
of the multiple promotion bots and services out there,
Then you get an error saying 'missing required posting authority'