I have met plenty of people who actually love to be light walkers. I keep their phone numbers on speed dial!
But I have also met plenty of people who hate it and complain, even though they keep volunteering. Weird.
Sometimes I call on a friendly donor who is able-bodied and enthusiastic about our work to come be a light walker. I usually have someone else - an intern or available staff member - hang around if I can't so the donor can get a little hospitality. This is actually a great way to give friends of the company a backstage thrill. And it often results in a nice "thank you" check - or raises their giving level after this experience. It can also be a good story for marketing purposes - small newspapers love to pick up human interest stories like this. You really have to pick the right person. But if you do, it can be a major success for the theatre's business in many ways.