I got a message from someone I've never met before, or even heard of, from Nigeria. He wants to learn to write Java code and is asking me if I can recommend any websites or e-books to help him. He seems legitimate and sincere. I don't hide my web presence, so there are any number of ways he could have found me as a programmer. I'm considering replying.
However, with scams of Nigeria past in mind, I just want to double check: is there any security risk to replying to a Facebook message? Anything dangerous about this?