And how do you troll others if only the home owner can place items or decorate? I think in this case it would be more positive than negative.
You only put one Enchanting, Alchemy and Transmute Station in the Guild Hall.
All the Set Stations should be Alphabetized. If you pick the right home, it is easy to put everything in a logical order in one area. My guild has the Arena. There are other homes to use.
The game does have Banners for each Profession, but I don't think they are really needed.