The truth is that most of the time people want to influence something on another domain without having access or acceptance of the owner of that domain. Which makes the things if not impossible, at least malicious. Don't you think so?
"malicious" stems from "malice", which i don't think is a motivation in most of these requests. I think many coders, especially the newer ones that ask lots of questions around here, are just unaware of the SOP.
i also think that hackers wouldn't ask many questions in public, or would know how to figure it out themselves. Otherwise, they wouldn't be a very good hacker...