This is probably a good question that contains some valid issues. If you are a waiter/waitress and you are conscientious and as a professional, have made yourself aware of the seriousness of Gluten-related issues and Celiac Disease as it relates to eating out, then please do not be offended.
"Is there a salad dressing that will pretty much always be GF if you are going to a restaurant? See, I don't really trust the waiters because if they don't know what gluten is or mistake it for just not being able to have bread then they will of course tell you it's okay. But I'm just curious if there is one that's safe to choose at most places. Did that make sense? Click here to read the discussion.
On the other hand, if you are in that profession and you have yet to educate yourself about this, then Rhonda's concerns should ring true -- though they may be uncomfortable at this time.
If you would like to learn more about Celiac Disease and Gluten-Free living, there are many reliable resources. One can start with Gluten-Free Simplicity.com, in particular, here is an article about the necessity of avoiding Gluten at ALL times for people with this disease.
Either way, we are each responsible for the products that we deliver/serve to the public. Agreed?