There really is no winning solution that will work for all users, no matter how explicit or visible, you make the rules, someone will find a way to limbo dance around both the letter and intent of the rules:
user> I’d like to suggest blender adds X
devs> no feature requests on devtalk, use rightclickselect
user> bah humbug
sometimes it ends here, as it ideally would, other times however…
clever user> Ok, what do the devs think about adding X?
devs> we told you, no feature requests
clever user> technically not a request…
devs> yes… very clever…still no though…
clever user> Hi i’d like to talk about X / Are there any plans for X
devs> for the 3rd time, no feature requests!
clever user> I JUST WANT TO TALK! WHY ARE YOU LIKE THIS?!
devs> this is a developers forum, unless you’re looking to implement this your self, this is not the place
clever user> What exactly would I need to type to implement X
devs> so much bad faith here…we’re out…
clever user> You guys are mean! and very unhelpful and lazydodo is a jerk for closing all my threads…
I have seen variations of all of these, and on more than one occasion the whole limbo dance coming from a single user, it’s moderately depressing.
anyhow, if someone wants to tweak the banner, go at it, but i’ll be upfront here, it’s unlikely to work.