I was there, and when he was on I was very wary. It wasn't until after he left when I remembered user Ralph Vargas told him to reply to his post on Mike's blog. RV was the pen name on his blog.
I checked and just saw Mike's comment back to him a minute later after he left.
I can recall my first wary response to him in the chat. Me: ...Not the real Mike Shinoda, right?
Mike's reply: That's for you to decide.
XD And I hath decided.
He was also checking and asking around for bugs on the website. Then he was asking everyone on what music they were listening to.
He'll be around to visit again for the next few weeks he said! :)