There are also trickster wizards and witches who like to enchant ordinary Muggle items in order to either harm or play a joke on a Muggle. There are examples in the books, but I can't think of any right now. But, when a wizard uses a Muggle device, it's against the law. That's where Arthur Weasley comes in. He carries a badge.
Todd, another vote for you reading the novels. I resisted a long time, but I'm glad I finally took the plunge. I'd put Order of the Phoenix as one of my favorites books of all time, regardless of reading level or genre. Pick up Sorcerer's/Philosopher's Stone. It's a pretty short read, and I dare you to stop at just that one.
