Revenge,Ego and the corruption of Wikipedia

I feel like it is crazy that anyone can just edit whatever they want on this website and all they have to do is set up an account and edit. So for example if you had a personal vendetta against someone, you can just edit all of the stuff that person posts and not only that but you can make them look bad by editing all of it. It just shows that just about anyone with very little to no knowledge and they  can do what they want with the blog and people will believe the information. In no way does this make it right but at the same time, we all know that Wikipedia will not change the way they are no matter what the cases are and how they appear. Wikipedia does have people that can watch over this stuff but with all the information on there, it would be impossible to be able to track it all and fix and edit it all, all the time constantly so some things will slip and not be caught and in return can hurt many people. You also never know either because the editors could also edit and change things based on how they want it to sound or be worded or if they dislike the person personally. This changes my view on how it works and the information from it because normally it is pretty reliable but from now on maybe ill use it as a starting point and use the references they give to help further my knowledge on certain subjects.