If they've been disinfected, why not?
As a rule, I don't touch anything that other people have touched without disinfection. And I almost never get sick. There is a lot of stuff that is way more contagious than Ebola out there.
Having some bowling alley guy shoot a squirt of Lysol on the insides of shoes isn't disinfecting and I have never seen them go around cleaning out the finger holes or surfaces of bowling balls.
You are braver and more cavalier than I would be considering the adverse potential.
That's the kind of oversimplification and denial that has helped to contribute to the current epidemic in Africa.
In those African countries where Ebola is out of control people had the same mentality. Some believed it was a plot by the whites against the blacks. Others believed it didn't exist. Others simply refused to believe that it was easy to catch. And now it's still out of control and just as easy, if not easier, to catch.
The only reason, the only reason, why people aren't coming down with it right now left and right in the US is that our country is vast and the incidence of the disease is low. It's as easy to catch as any other virus. It spreads very much like the common cold and many other viruses...a contaminated person touches something and then someone else touches that object and then rubs their eye, touches their nose, mouth or face.
There's not a whole lot of surfaces or objects here in the US yet that can spread it. There's tons in the West African countries and it's spreading.
When it takes hold here it will be just as easy to catch.
And as long as it's out of control in Africa it's only a matter of time until it takes hold here. There is no cure. There is no vaccine. It has a 70% mortality rate.