But it's not just about staying legal. You're typically going to be asking somebody for something that you are interested in, a field or hobby that you do yourself. If that's the case, you'll find you're emailing somebody with similar interests to you, and unless they're a celebrity who has not that kind of time, you can build a following of decent, intelligent people.

I love that you reminded us of this notion. Not only would we be doing the right thing, but it is also a very effective way to connect with like-minded people doing amazing stuff. Also, in my experience, science people are usually very open, cooperative and willing to help each other.

Great post, cheers!