Actually NB employs enforcers that come out and steal your beer if you're caught plagiarizing their recipes.
J/K, I'm sure they know people do this, but are still confident in their store to put the recipes out there for anyone. Its also one of the best ways to start tweaking reacipes as you learn about the various malts/hops. Take one of their recipes and make a couple of minor changes. One of the steps along the way to designing your own recipes from scratch.
One small caution I would have is that if you are using liquid extract, make sure your local brew shop has sufficient turnover to assure you don't get old/stale extract. NB, Midwest, Austin, etc all have huge turnover so its almost always really fresh. DME would be a safer option if you are unsure.