I think Jeez is short for Jesus - Dad told me not to say it back in the 50's when I was a kid.
That being said, I don't mind bad language in the right time and place, like on fishing trips, where it comes in handy.
I like Halloween, though, especially up north, when there is a chill in the air and the leaves have turned. It brings back childhood memories.
Okay, I don't allow my kids to say anything but Jeez wouldn't bother me in the slightest. That's just going overboard.