Option 1: Offer them a legal agreement that the easements will not be improved for the next 10 years in exchange for them paying you 50% of the price you paid for the easements.
Or offer that any road built on the easements would be solely for the use of the residents of your parcel, and that UPS deliveries, tradesmen, etc, would be required to use the existing road. Agreement could stipulate a locked gate (installed at their expense), for example.
Assuming you’re dealing with people with a shred of rationality, anything is negotiable.
Option 2: Video, video, video. Use an app that uploads time stamped video directly to a cloud server. If you catch them brandishing a weapon on video, FILE A POLICE REPORT, or (if the police are unwilling to act) speak to someone at the prosecutor’s office directly and press charges.
Sounds like their harassment has moved into the realm of criminal activity — you might be able to skip the restraining order part and have them arrested. Once they’re arrested, you can ALSO get a restraining order, and the fact that they’ve already been arrested for harassing you will be great grounds for doing so.
If they’re hardened thugs, they may not care. If they’re just bullies who’ve been allowed to get away with their abuse for too long, a night in jail might change their outlook entirely.