Perhaps
Perhaps certain folks at certain Casinos were not as discrete as they should have been, but if that's the case I didn't hear about it. I followed this story fairly closely when it was hot news, and from what I gathered, there were several journalists that got wind of his high stakes trips to Bellagio, Caesar's, etc. and obtained this information through intensive investigation. I don't think casino management was exactly forthcoming with the info. But then, they had to get it somewhere, so I don't know. Certainly I agree that lack of discretion undermines the credibility and respectability of a casino.
What I personally loved, though, was seeing the wind taken out of his smug sails. Bennett's group, Empower America, has specific positions against the proliferation of casino gambling in the U.S., which from my perspective hints at least at hypocrisy. Bennett also said after exposure that he always gave a chunk of his winnings to charities after gambling, but failed to produce any evidence that would back up this boastful excuse. On the other hand, I don't think he really won very often, so if the point is moot, why even bring up the charity bit if not as a lame justification. I would have had more respect for him if he just admitted what he did and had a credible response justifying his reasons why gambling is bad for you and me, but okay for him.
Full disclosure, I am a Democrat and I suported Clinton. I definitely have an axe to grind with the right wing radicals who are taking our country in its current direction. (As if that weren't obvious)...