Learn English – the term for a person that feels the urge to read everything

Dysgraphia, per Dorland's Illustrated Medical Dictionary 31st Ed., is simply "difficulty in writing." Therefore, I disagree that this is a correct answer.

Agraphia is defined as:

"Impairment or loss of the ability to write; it takes two forms, one involving poor morphology of written letter forms and the other a reflection of the aphasia also observed in spoken language... Called also graphomotor aphasia"

I do think you need to carefully make a distinction between the person who never learned to write and those who have lost the ability to write. One may be a learning issue, whereas the other can be the result of a neurologic problem, such as a stroke. Agraphia and dysgraphia are terms that imply that the ability was once there, but is now either impaired or lost.

I don't know of a term that would cover the loss of the ability to write through disuse.

I often see the word "Infotainment" used in in this context, which is a portmanteau of Information and Entertainment.

Another word that comes to me is "Gamification" which can be defined as converting something to a game in order to trigger the desired behaviour. This very site is an example of that.

(Wikipedia links added for additional reference)