My only question is around the loophole that political organizations can do this if they aren't using "robotexts". How do they prove this? I've received three

My only question is around the loophole that political organizations can do this if they aren't using "robotexts". How do they prove this? I've received three texts from an organization I'd like to do this to. Every time they've messaged me, I've responded and asked whether this was a human sending the message. No response. Maybe I'll just bite the bullet and try.