Take the high road if you can, and take some time to cool down.It can be hard to think when you're that angry. I would not throw them off but rather let them know how mad you are about the situation. Make them make the decision about how far they are willing to push. If they continue to disrespect you and break the law I would then kick them out and alsotell the remainder of the family why. You have resposibilities as a land owner to keep illegal behavior off your property.

That is a tough situation and I hope it works out. Next time (If there is one) make them sign a waiver form.

On another note taking deer illegally israrley justified and I wouldn't let them back on the property after they leave.