With great power comes great responsibility someone once said, and they were correct.

Imagine the chaos that would occur. Of course we first think of the little, helpful things: lost keys, that missing sock, saving the remote from the dust bunnies under the couch, etc. However, we often fial to look at the bigger picture.

Celebrities could use it to their advantage, though I doubt they would use it for "evil", as they have an image they must keep up. Wouldn't want to risk any controversy and losing money right? But they could whisk away paparazzi's cameras in an instant.

Even bigger than that, the world could very well enter another World War. The US may accio oil from other countries, then other countries would be furious and accio the Declaration of Independence. Terrorists could accio all the materials needed to make weapons, and people would be accio-ing people all over the place.

That's why the Wizarding World has a Ministry of Magic. To control the wizards.

And that's why there are only a few Wizards- it's the balance of life. You cannot possibly control magic when it's that widespread.

Magic is a wonderful idea and concept to play around with, but in reality, it's not very practical.