Some Celiacs may see a sign like that and run the other way. I did the opposite. I asked a bunch of questions. I found that Hannah’s Bretzel in Chicago did a great job of preventing cross contamination when making my GF sandwich. A chosen staff member went to put on a different color of gloves, and then went to a separate area where the GF baguettes were individually wrapped. He then used a special knife kept in that area that had been wrapped up when not in use. The end product was Hannah’s Club on a gluten-free baguette.
This “Über Sandwich” had organic smoked turkey, bacon, gruyère, avocado, vine tomatoes, red onions and romaine hearts. It was quite good. I know that every time I eat out I am making the decision to put myself at risk of being gluten-ed. My experience at this particular spot was great though and I appreciated their sign to show that they were educated on what gluten-free truly means.
gluten-free in sb 
Thanks for the kind words about our gluten-free options and actions set in place for our customers. Appreciate it!
Thank YOU for my tasty, gluten-free sandwich!