No nexus like jump hole thingies. People would inevitably just use those shortcuts to trade. No matter how strict the enforcing there would be countless of infractions. The enforcing would require a full time admin just to sit on the system. The cap ship fly throughs would only increase in number.
Unless you could make the jump hole one way only.
Also moving the starting place to Connecticut or any dead-end place would not really help. People would just fly out of the system to hang out above Manhattan as usual (or any other main planet if the dead-end system would be located in some other house's system).
The big part of the hanging around is that there are other to hang out with. This resembles very much real life where teens go to hang out at mall with their buddies and fool around. To go nicely with this kind of activity is the show-off mentality. Why else do you think there are Battleships flying around?
There are very few things you can really do about it. One would be to pick and groom the potential future RPers while trying to keep up the appearances by setting the example in NY (or any other place). Another would be to have a constant admin like watchout on the proceedings. Taking the things through the court (sanctiion reports) is time consuming so Disco needs Judge Dredd type of instant meting out justice.