Since when is Russia 'one of the sketchiest countries in the world'? On the Quality of Life Index, they are rated 64 out of 68. There are 194 countries in the world which means there are 126 countries that don't even make it on that list. This means according to the numbers, there are plenty of places in this world that are worse to be in than Russia.
Yes, it's sketchy, but if it's like the rest of the world, that depends on where you go and what you're doing. The same thing could be said about going to ANY city in North America.
Could terrorists attack? Yes, but if 9/11 taught us anything, it's that it can happen anywhere, any time and there isn't a whole lot we can do to stop it.
My bet is when it's all said and done, Sochi will be another typical Olympics without any extra excitement.