Auction House fat finger

[Ukase]

So, I know in Menu-options-general, there's an option to enable a warning for a large auction house fees. 

But, I'm told it doesn't prevent you from using one too many zeroes when bidding. I have mine disabled, as I deal in larger numbers often enough that I've gotten tired of it asking me if I'm sure. 

But, a case in point, I just opened the AH with it flagged to enable the warning, and it was quite okay with me bidding 300M for a nemesis recipe. (Thankfully, nobody listed one, because I can't see spending more than 2k inf for something that has no utility against npcs) 

I thought maybe having 1B might be too much to have on hand, so I bid 900M for it and still no warning. 

Is there a way for it to flag attempted purchases that are more than 10 or 25% of your current level of inf on that character? I'm guessing no, but since I've never seen the suggestion, figured I might as well suggest it.