It would never get this far because:
1) Most reputable galleries are concerned for the the kind of P.R. they might get.
2) Aside from criminal prosecution, there is the very probable load of lawsuits that would be filed even if the animal didn't get loose and hurt someone, (let alone if somebody did get injured). We're as litigous as hell in this country.
3) One of those lawsuits would be filed by P.E.T.A.
4) Institutions have lost their accreditation for less.The New England Acquarium had a close call with accreditation over mainitinance issues, we havn't gotten to starving the fish yet