Pretty much.
Can you imagine if they had the monitoring and indexing capabilities then as we do now?
Hell, can you imagine if they could track everyone that wanted to kill Lincoln? Nixon? Hell, they almost initiated a coup against FDR back when he was ruling this country with an iron fist.
I'm just saying, I think the Obama administration is playing up this "most threatened President ever" angle. I mean, if it works, it works, but I doubt this guy is catching a level of heat that's unusual for the sitting President of the United States.