Thing is - if those vandals get a little smarter, they can easily make changes that aren't that easy to detect and even make sense. And even if it gets fixed in just 10 minutes - how many people do you think would read it during that period?well, if someone actually read that on wikipedia and began saying it as fact, they are very stupid and deserve to think thats true.
But really, how quickly was that error fixed? like 10 minutes? Thats really good.
Not saying wikipedia is bad, but it shouldn't be fully trusted as people seem to do more and more - checking some other sources is always a good idea before accepting something as a fact.