[quote=@ImportantNobody]
<Snipped quote by Innue>

Rationalizing it can be done the same way as a lot of magic.
[/quote]

'Because magic' is not a rationalization. You need to understand[b] how[/b] you are accomplishing the effect.

[quote=@ShidenBlades]
In my opion I think some abilities should simply be banned or heavily restricted, as it then it comes down to a pissing contest rather a test of writing ability and being clever. 

And as far as magic... well, any good magic (in my opinion) has a heavy drawback for the power. I know not everyone sees it that way. But, something for nothing is...boring.
[/quote]

In all honestly, at the tier you would encounter time stopping magic, you'd be running up against abilities that can counter it. I think outright banning or even restricting any abilities is silly given that it is voluntary acceptance of the challenge. You don't have to accept it.