There are two options:

• Don't display "Share as image" on disambiguation pages.
  • Advantage: Doesn't give this nonsensical option.
  • Disadvantage: Inconsistent, as only some pages can be shared as images and users may not understand why, which can be confusing.
• Display "Share as image" on all pages (current approach).
  • Advantage: Consistent. Although this option is weird in this case, at least the dialogue is consistent.
  • Disadvantage: Gives the user a slightly nonsensical option.

Given the effort that it would take to change this, and given that that effort would just trade one problem off for another, I'd lean towards declining this task.

This is declined from iOS, removing project tag, given the low impact and lack of clear solution. Personally if someone wants to share a Disambig page, let them... you never know what interesting things lurk on disambiguation pages :)

Especially since they can select any text on the page and share it, +1