If you'd chosen "Alice" and "Bob" as the metasyntactic names, I'd have thought nothing of it. "Jessica" and "Guillermo" I read quite differently.
why are you using stereotypically white names? this is exclusionary!
> use "Jessica" and "Guillermo"
why are you using stereotypically nonwhite names? this is racist!
it's just impossible to win with you people isn't it?