Comment by unboxingelf

I treat GitHub as a social coding network and I want individuals to be able to email me. I’ve received genuine questions, compliments and friendship by providing an email address on my GitHub profile. And if that’s not the product manager’s dream over at GitHub, I’m not sure what is!

So I think the solution to the problem is not to blackhole my GitHub profile, but to put systems in place that prevent the spamming techniques reported by the OP.