You're not submitting data to him, so no benefit to protect you there.

There is a risk downloading the text. Does it warrant a signature? I don't think so.

When you hand out candy on Halloween you could include a digital signature with each piece you hand out. People receiving the candy would have more confidence it came from you, and not a bad guy wearing a mask, sitting on your front porch impersonating you.

Does everything need signatures? The stakes of accepting candy are much higher simple raw text.