Easement rights

[hicksd39]

My parents have property which has easement access to the property owned by another indivdual behind them. My parents have been having a problem with the people behind them riding gocarts and spinning gravel, parking vehicles at the end of the easement, which is their property, their relatives have been crossing their property to get to a relatives house on the other side of them. What, if anything can be done to restrict use to going in and coming out only. Not to use as their enjoyment and tearing up the property.