How to deal with the ignorance of customers?

their is really nothing you can do, that's just the ignorance of people. the best thing you can do tho is just simle at them and tell them this "i dont tell you how to run your life so dont tell me how to run mine and walk away." (with a smile on your face). and just keep going on with your life, because their will always be people juging you about your appreance.