I'll pick #3 and I'll tell you why.
Number one, blowing up your shoe, on the face of it, is a patently ridiculous and asinine way of bringing down an aircraft. A lot more bomb materials could be hidden in or on other parts of the body. Or carried onboard hidden in a variety of ways in one's luggage.
The problem I have with the shoe thing is that one moron, several years ago, tries...and try is the active word here...to blow up his shoe and since that point, we have inspected hundreds of millions of shoes only to find........nothing.
That alone tells me we need to be on the outlook for other, perhaps more creative, ways of blowing up an airplane and get off the shoe thing.
Does that mean nobody would try to blow up their shoes again? No. But there are so many, many ways to blow up a plane if one was determined and we need to get the focus off shoes. People have been wearing shoes on planes for decades. I'll wager there have been tens of billions of shoes on airlines over time and yet not one pair has caused a loss of life.
At what point do we get on with life and get off the shoe kick??