[William Tell]

From Hawking's behavior, it sounds as if he knows full well who is injuring him.

If I were that person, I would be very troubled by the fact that Hawking is among the most intelligent people alive today. If anyone can figure out a way to ensure that a tormenter is identified and punished if something happens to him, it would be Hawking. He certainly has email and records his scientific work in his computer.

[Burn24]

There's many different types of intelligence, and the story about his first wife indicates he's a little deficient in one type. Perhaps, like a blind person with extraordinary hearing, his academic ability comes at a cost to his emotional good sense.

[Sacajaweau]

You're absolutely right. He can use his computer at any time to convey problems. Why wouldn't he?? No reason at all.

Heard he's rather reckless driving his specialized chair.