If it is private land and you hold the hunting rights to any of it, post it as such and prosecute all offenders. If it is public land, then unfortunately it is every man's right to use within the limits of the law. As long as running dogs is legal and those "low lifes" are not breaking any other laws, they have just as much right to run their dogs through it as you do to hunt it. Not a pretty picture, and not fair from your perspective for sure, but the nature of the game as far as public land goes.
Are the dogs running on anyone's property that is private land that you might persuade to protest along with you? Sometimes several voices will get action from law enforcement when one voice alone will not, especially if it involves property owners' rights.
This sad tale is just another reason why no one can afford to buy a piece of hunting land anymore - it's all gone out of sight price-wise because of the increased demand. People are tired of dealing with all the public land crap and want a piece of their own land to hunt. Increased demand has led to increased prices. It is cheaper here in Texas to lease a quality place for 50 years than to purchase a place a third the size of the lease.
Of course we don't have much public land, and most of that is mis-managed to hell by TPWD. In five years of trying I haven't drawn into a single public hunt. I'm not even sure I would want to given all the rules and restrictions they are dreaming up in the name of management. Some of their so-called "managed lands" are being managed to allow the harvest of one actual deer per every 2,000 acres or more. How is that management?
Anyway, as to your dog problem, I don't know of any ethical solution. Such is the case with jerks and inconsiderates. They don't respect anything, including what they themselves value. :twisted: