It would be awesome if they were allowed to Google me from their stations, since the Internet is very clear that there is only one male human being called Laurie Voss in the entire world, and Twitter provides daily records of my movements for anyone who cared to find out. Unfortunately, they are only allowed to look at the screen in front of them, and the few details in the USCIS database.

Actually one time, I was able to prove to one border officer that I really was the CEO of our startup by Googling our website and showing him the "about us" page. He even let me log into my Gmail account and show him proof of my company's existence (PDFs of lease agreement, incorporation documents).

Maybe it's just me but I have always had really good experiences with border officers and those guys have always been friendly to me. In the particular case described above I ended up chatting with the guy about random stuff for like a few minutes after which he wished me a great day.

Don't forget those people are human too, and unless you act like a terrified robot, they will more likely treat you in the same way.

Yes, this is something I can relate to. The worst I've had is being ignored when I try to make conversation ("Good Morning", "How's it going so far?" etcetc), but usually they seem happy to help.