As we can see from the causes of these accidents, the MD-11 itself isn't an unsafe aircraft. None of today's airliners are, for that matter. Look at the 747! How many have been lost? Who says it's a particularly unsafe plane?
As most of us know, accidents happen 90% because of the so-called human factor. Some are related with bad weather, some with engine problems, but _very few_ with the construction or whatever of the aircraft. In unfortunate cases, a combination of factors occur in situations that may never be solved, so the aircraft gets blamed. Then there are cases where an airline has many of certain aircraft type and that particular airline also experiences many tragic crashes. In these cases, too, the aircraft often gets the blame when the true causes of the accidents may have to do with airline safety, crew communications and what have you - that is, human factors.
Both the DC-10 and its successor have had very bad publicity for reasons that have virtually nothing to do with the aircraft itself. I wouldn't worry about flying on one of those birds - it's certain _airlines_ one wants to avoid if statistics are looked at. But I wouldn't lose my good night's sleep over the airline matter, either.