While I respect other people's opinions about the accuracy and stupid plot holes (pilot ep, not landing the plane manually, etc)... This is a Hollywood entertainment show, with the emphasis on entertainment.

So,
a) you have to create a crisis
b) you have to make up situations that create drama and suspense
c) it needs to be exciting

If you went down the road of technically correct and 100% realistic, you might as well call it a documentary and cancel the show... because 90% of TV watching people want entertainment and suspense, not realism.

I find myself in the following situation. I can call BS on 90% of the stuff in the show, much like pretty much every other successful show(CSI, Fringe, Mentalist, etc) but I don't. It's not SUPPOSE to be real.

The reality of Airport control software and how a failure would be handled is boring in real life.
The reality of how a biological attack on a senators daughter would be handled is boring to the point of tears
The reality of bringing down the Internet, and getting rid of all evidence of an e-mail contents would equally be dull as watching paint dry.

I much prefer suspending disbelief (like we do when we watch sci-fi series) and simply enjoying the suspense, action and FICTIONAL plot which does not have to make sense. If that's not something you are capable of, then this show might not be the right fit for you.