Yes. Your friend should go back to the Time Machine and return to the Present.
The "cyber 9/11 event", that has been talked about for years - and that will give our Western governments the excuse to implement[1] all that - is very close[2] to happening.
So, he shouldn't be that far into the Future and, subsequently, will not miss that much.
--- 1. http://www.youtube.com/watch?v=-yp8o2TTee02. http://news.cnet.com/8301-1009_3-57565763-83/cyber-9-11-may-be-on-horizon-homeland-security-chief-warns/
