He also might not be in a legal state! Or have more plants than legal if he is.
It also gives thieves a clue as to where to get some free weed. Identify the lady, and it's relatively easy to find out where she lives. Follow your journal, and after you've been to trim jail - strike!
It's a very good idea to refrain from posting images that can be used to identify anyone, or your location. It's also a good idea to use a unique identity here, and keep that secret as well.