Whatever the issue - there is now a solution.
Simply place a paper bag, with your message inscribed on it, over your head.
Problem solved. The best part is, since your message is written on the paper bag, if you also speak your message out loud in the middle of, say, Queen Street Mall, you are catering for both the deaf (through the writing on said accessory) and the blind (through your voice) - as well as everyone else. Champion.