This is a great example... except I think the right answer to "what exactly would you do in this case?" doesn't support your argument.
I'd document that mobile Opera with Javascript disabled is an unsupported config, and ask a team to make a help center doc asking mobile Opera users to enable JS.
I'd document that mobile Opera with Javascript disabled is an unsupported config, and ask a team to make a help center doc asking mobile Opera users to enable JS.