The land south of 465 is owned by the Central Indiana Land Trust and is an Indy Park through a recreational easement. Neither Indy Parks or CILTI allow motorized recreation. I stopped by tonight and didn't see any signs of significant 3 wheeler activity.
Please feel free to stop any motorized traffic. There are cases of legit use. Indy Parks, HMBA, Cilti, or the sign companies may at times take vehicles back there for work. In now case should you see anyone tearing it up over there.
Those who are legit have should have no issue with you stopping and asking them who they are.
I am suprized that a working 3 wheelers still exist. No one with legit reasons for being there would be on a 3 wheeler.
Typically anyone trying to ride over there gets tired of getting stopped and doesn't come back. If they are riding aggressively, they are putting park users at risk, and you should call 911. If you post on the forum, PM, or email me while it is happening, I have contacts at CILTI, Indy Parks, and the Crystal Lake subdivision and find someone to go out and deal with them.
Thanks for trying to talk to them and letting us know to be on the look out.