If you don’t explicitly say whether you’re a CA resident or not, how would they know?
For the website form I filled in, they could look at my IP address and see that I probably didn’t fill it in from California; not reliable, but certainly evidence.
If someone sends an email… maybe if there seems to be a real name attached they’d compare that to voter registrations? I dunno if that info is available to them. If so, that also suggests not sending an anonymous or pseudonymous email.
(And maybe I gave a name when filling in the website form, idk.)
So, that comment just says you can do it without living in the US. It doesn’t say it’s a good idea, and if there are reasons it’s sometimes a bad idea, it doesn’t engage with those.
If you have reason to think it’s not a problem in this case, can you say what that reason is?
Sorry, but from my perspective as someone living outside the US, this whole thing is really not clear to me.