Anyone who right out says "I can't do it" isn't someone you want on your team. Someone who says "I can't do it yet" is. A programmer must be willing to push himself beyond his limits to get better, or he/she will be nothing. Every project I have done has been beyond my grasp when I took the project on but I pushed beyond myself and figured it out. Check out the "go to guy" at your work/school/whatever, he seldom knows how to do something, he usually knows how to figure out how to do it.

This does not excuse your wording. It's childish and makes me think a 10 year old is asking me to join his "leet game krew".