They can't collect from a corp with no assets.
They sorta tried using a credit card with a $100 limit. Didn't help.
If Google wanted to, they could set up budgeting PROPERLY so this would never happen. But they didn't. And if they hadn't "forgiven" the debt, chances are the courts would have decided NOT in Google's favor during subsequent legal actions to collect the $72k
in any case, corporate officers are registered for all corporations with appropriate gummint authorities. if they wanted to, they could sue the CEO directly (for example), or go after stockholders. So a shell corporation would help a little, but not a lot.
A lot of lawsuits have been won against manufacturers because product documentation/labeling didn't have an explicit enough warning. Not sure if in this case such a thing would apply, but who knows what can happen with high paid l[aw]yers in a court room with an advocate-type judge and/or jury pool.
[this also makes the case of having a private cloud server to test things like this on yourself, before submitting to a provider like Google]