I don't think @mrhenderson15 is real. If it were, I'm sure Jon Scheyer would be following him. Also, Duke Blue Planet would have included him on this list:
http://www.dukeblueplanet.com/blog.asp?bid=9&pid=444
I also don't think JJ's is real. I agree with some of the previous posters -- most likely, the real JJ wouldn't have posted some of the tweets on that account.