@blackyawgdom
Technically:
No upload restriction = anyone, yes, ANYONE can upload whatever releases they want under this group's name. Spammers/Scammers always make use of this to upload fake chapters.
What you said is more like "courtesy", as in people shouldn't abuse the non-restriction and upload random things under a random group. If a group is inactive/disbanded, for example, then you can actually upload their releases under the group's name. Forgot to add, if a group is active, but do not allow their releases on MD, then even if you have chapters by that group, you still can't upload them here.