I was about to get up on my soapbox, but the topic seemed so familiar that I looked at some of my old posts and found
this one from 2008.
The post atarts with this quote:
"When a distinguished but elderly scientist states that something is possible, he is almost certainly right. When he states that something is impossible, he is very probably wrong."--Arthur C. Clarke
When you act as an expert and tell people that that "it wont wok", you are not inspiring them, you are preventing them from exploring and learning.
By the way, after that post was made, the team was invited to attend championships, played in the quarterfinals there, and won the Xerox creativity award.
Please read the post and think before you stifle creativity.