The majority of these centers are far from organized, and in order for an idea like this to even work the users must know that this is the map they should go to.
New users would most likely not know where this map would be at nor that it would be used for these things, while slightly older members being these "Centers" probably just want to be where all the users are at to get a purpose out of being a "something center", which means they'd just go wherever they feel like, and there's not really anything that says they cannot do it in another map unless we'd make up a new saying "Only centers in this map", which I honestly would find a tad bit silly.
As far as realism goes in the game I don't find anything an issue since wings, dashing and even items has been implemented.
But I honestly do not think a advertising map as we think of here would work that well, especially if they are for the centers that we usually see in bonfire, they have lack of organization and some of them do not even know manners or the game rules they should follow. Chaotic as mentioned above is probably a good word of what would happen there.
The print screens function that's linked to the prnt screen button, you should be able to edit inside of the options menu if I remember correctly. If so you can bind it to any key you like on the keyboard so it's not an excuse. And the thing with have a public report button that we used to, is to have a good and working way for this to go through. Even though this report button never really worked, 90% of the time when I heard someone talk about reporting someone using this it was out of extremely dumb and personal drama, in a game like FeralHeart, I honestly think reporting cannot be done "that" easy since many of the members will abuse this function, and I do not think staff wish to spend every single hour of their free time reading these reports, even if some of them would turn out legit.