You're not your Github account. You're not your Facebook account. You're not the car you drive. You're not the contents of your wallet. You're not your f'ing open source project.
I don't espouse the negativity in Fight Club, but the quote that I've adapted seems particularly relevant here.
"Facebook users 'are insecure, narcissistic and have low self-esteem'"
http://www.dailymail.co.uk/sciencetech/article-1310230/Faceb...
I consider Github sort of the developer equivalent of Facebook. Let me clarify that. If you're posting stuff on Github just to impress recruiters and fellow engineers, then it is. If you're using it in a constructive way, less so or maybe not at all. The point I'm trying to make is that there are parallels between the two.
Look. It's good to provide recruiters (by recruiter I mean a real engineer here who is evaluating candidates) evidence that you're skilled. There are many ways to do that. One way would be to bring in code and discuss it. Another way would be to work through programming problems in the recruiter's presence. I'm not talking about "a-ha" brain teasers but real, actual programming. After all, that's what a programmer is (theoretically) being hired to do.
But please do not encourage an arms race where programmers fall over each other trying to see how much code they can post publicly, and how much work they can give away.
I'm highly skilled and my time is precious. I don't spend it looking in front of the (Github) mirror, and I actually charge money for it. Charity is a good thing, but you shouldn't do it to boost your ego and image. And further, if that's all you spend your time doing, I would wonder why you want to work in private industry where the purpose is to make money so we can be employed. You know, engineers at Apple might not have Github accounts, but they are employed and support their families. Apple's work also lifts tons of people out of poverty in China. How many people does your open source project feed?
You guys need to step off the ego train and direct your energy into stuff that actually matters. And you will be happier for it.