You can use these same steps whether you know the person or not, Gaylor said. She noted that it might be easier to set boundaries with a stranger when you're in a public place, but on the other hand, you can appeal to your relationship with someone you already know; "asking that they respect your views out of an honour for the relationship." And if you're in a public area, be aware of your surroundings and keep your own physical safety at the forefront of your mind. "Know when to disengage," Gaylor said. "When you feel that what you're expressing is not being heard . . . the back and forth is not going to work."