[quote]should we just let people decide their own magic and it's rules? would be easier and faster i guess
[/quote]

This is the answer to your question. Plus it wouldn't make much sense to apply a bunch of rules in a world where reality, time, and every other universal constant is breaking down around us. Chaos is the name of the game here... Just no god modding. (I will beat that horse long after it is dead... because zombies. Lol)