I am amused by the number of people posting for new laws/rules/guidelines. Prantz is a major PITA, and you want to bring that to the other cities? Yeah.
How about this...Set the guards in every city to attack if you have a weapon drawn.(Make them level 20's, hasted, obviously)Have the Prantz gates strip your magic off you, then beat you if you are seen carrying heavy packages (encumbered). If you are caught breaking these rules, the Character you are playing is made unplayable for a minimum of one RL week. If you are thrown in jail, all the possesion you have on you are stripped and sold to pay for the food you will consume while in jail.
Clamoring for rules has a way to come back and bite you in the butt. A better solution is to find the people and tune them up. I have complete confidence that you know at least one person who has their ox parked in a public area. Did you ask them to move it? Have you mentioned this in game to the characters you see? I park my ox in my house, in theGuildhall, or in the stable. Right now, I have no clue where it is, as it didn't transition with me when I zoned to Port Hempstead, and I don't feel like paying 250 True to find it.