Wish: Feeding Arc Negative Domain

Would it make sense for the Arc tool to Automagically just accept a [0 to less than zero] domain?  It's simple to tweak it with a script, but seems like a situation that could be beneficial to the component.

Thanks!

p.s. of course there are other conditions...both ends need to be checked...maybe in the end its too much logic to bother, but this one seemed like an obvious case...

Maybe when the arc command would generate an Invalid curve, this checking kicks in?