No, beyond the thing you have to sign up for.

I want to say I'm totally fine with this, but know I've received hacked stuff via Wonder Trade before.. Hmm.. So yeah, I see the problems for those innocents out there.

I wonder if this also applies to Pokemon that were hacked in games prior to gen 6 but were passed over to the games just fine.

You fail to understand.
A first time offender is already banned from the system you sign up for.
That leads to the question of how much more worse can things get when you're already banned from the ranked system? After all, if you're already banned from the ranked system, what's the other system you have to worry about?

They somehow ban you from the PSS? I can't think of anything else.

Is it possible? I dunno.
I'm just curious, is all, since they plan a harsher punishment for multiple offenders than just banning from the ranked system, so it just may be something one would have to worry about.

Honestly I doubt that anything too serious will come out from this. It's just impossible to implement.

Think we'll ever get a male Kangaskhan counterpart?

That would be good. Would you like a Nidoking/Nidoqueen situation?

I was actually hoping for something with a bit more contrast, like a smaller, more nimble styled kangaroo.

Breloom is a nimble Kangashroom.