I don't mind getting passed, regardless of their condition. It inspires me to work harder so I can get faster and stronger.
Last year, in the MS150, climbing up the most significant hill in the whole ride, I was in my lowest gear and really grinding to make about 5 mph. A guy pulls up next to me, puts his hand on my lower back, and gently pushes me up the hill while coaching me with my climbing technique. I'll never forget that experience, and it's part of why being passed doesn't bother me. We're all at a different point in our training, and I'm just proud to be out there in my 312 lbs. of lycra glory. I wish I knew who that guy was, because I never saw him again, and I'd like to let him know how much his gesture of kindness meant and still means to me. He wasn't judgmental or condescending, just willing to help a struggling old fat guy.