Andria,
I'll explain the danger, and then you can figure out whether it might be an issue for you or not. (I suspect that with a kick, it's not an issue).
The wrap is supposed to electrically isolate the outer case of the battery, so that the only place you can get the negative contact is on the bottom.
If the wrap is torn down the side, then the outer case could come in contact with the tube of the mod, and fire it, even without the button being pressed.
If the wrap is torn at the top, some mods will make contact with both the positive connection to the battery AND the top of the outer case. This is very bad; it will directly short out the battery. A kick has a smaller top contact (smaller than the button-top of the battery) so it shouldn't do this.
Do make sure the tear won't allow an accidental connection; re-wrapping a battery is fairly easy, or you can even tack down the tear with something.