That will depend entirely on the morality or the ethics of that person, I am quite sure the majority of the gamblers out there will never think about cheating the casino even if the financial gain could be high, however there is also a small number of gamblers out there which are looking for bugs or even trying to find ways to provoke them, and it is clear that for gamblers like that if they happen to find a bug they will take advantage of it immediately and hope for the best at the moment they ask for a withdrawal.
You can probably assume that these are two completely different categories of gamblers. The first visits the casino for entertainment, and the second only for the sake of earning money (even if it is illegal). The second category, in fact, is not even gamblers - after all, if they try to deceive the casino in a criminal way, then in other areas they are ready for crime.