Don't steal it. That'd be wrong and unjust any way you try to justify it.

With that in mind, though, try to make friends with them. I like the aforementioned blazin up by the railroad method; stick with it. If you befriend them, you might get a good deal from a good dealer on fresh, homegrown plants-- that alone is worth it!

Also, they probably know what strains they're growing, and this would be an excellent opportunity to buy and compare various strains.

Finally, they could probably hook you up with seeds and save you tons of money and trouble from ordering online!