How to stop a door from opening/closing by itself

I got a great question the other day so I thought I would post it for everyone to see. Please feel free to write me with any questions you might have and I would be happy to answer it the best I can. See the question and answer below.

Question: Several of the doors on the inside of my house like to open/close themselves, or even sit in between open and closed. It got worse after I used some WD-40 on some of the squeaking hinges. (The doors to some of the kid's rooms squeaked so bad, we could wake them up just trying to check on them.)
I'd like to know what the trick is to adjust the hinges on a door to keep it from closing on its own, or opening on its own, or even sitting half-way opened.

Answer: Here is a simple fix to you problem that is a permanent solution. Take out the bottom hinge pin (easier to get to, is the only reason). Place the pin on a hard surface and hit the pin with a hammer to bent it slightly. Then reinstall it,(you might have to tap it into the hinge with a hammer) and the little bit of a bend in the pin will hold the door open or make it a little more "stiffer".

I know....it sounds crazy and ridiculously easy but it really works great. Go try it and let me know how it worked. Cheers!