Then your form doesn't really allow for that. You're only asking to list the coolest thing someone has built. Why not change the form to: List the coolest thing you have built (maximum of three).
This enables the 30+ year crows to show their broader list of accomplishments and not artificially tilt it toward the younger audience.
You say you have higher standards but then you don't allow the higher standard to show. What if someone has consistently hit singles (to use a baseball metaphor) and a rookie has one home run. You're rewarding the onetime home run over consistent delivery. I'm not saying one is better than the other, but you need diversity and your system discriminates against that.
Hey, this is your show and you're going to run it the way it fits your need. However, with risk of blacklisting my name, I feel it's important for someone to speak out and help you see it from another perspective.
You also wrote this [1] back in 2007. Have your views changed since then?
Edit: As mentioned in a sibling comment, This appears to be an issue with Safari where items 'below the fold' don't render. Strange.