How do you phrase your refusal? I am not looking for work right now, and my current job didn't give me live coding sessions. I'm against them in principle.
But I can't figure out how to phrase it in a way that doesn't sound like you're dodging. Do you refuse while you're already in the interview? Or do you make a preemptive disclaimer when they invite you for a "technical interview"?
It's probably normal to forget. I am probably the odd one in that I'm always very aware of my age and I'm almost 40. I'm also acutely aware of the ages of people around me, and (very mildly) uncomfortable if I don't know someone's age.