How do you guys with cool-season grasses deal with neighbors who aren't with the program (re: TRYING to keep bermuda grass out)? I've got a great string of lawns on my 2012 program. I have one area that's not going to be treated (although I think I'll get his business on the better part of his lawn). And, it's directly adjacent to one of my customer's lawn. It's heavily infested with bermuda grass. Am I peein' in the wind? I'm guessing I don't want to know the pricing on the product I'd need to keep it out.