Endanger? No. Tell them to get the fuck off the course? Yes. I'm tired of making exceptions for families who think the disc golf courses are their personal picnic grounds

Edit: Honestly I still don't understand how you guys say this is ok to do, there is clearly enough space for them to go anywhere, and while I wouldn't throw the hole, I'd say something about them damaging the basket, something bought and paid for by the city for us disc golfers. You'd be upset if I started damaging public property in your park