Worst I have heard of woul be Mike apostle. Easy to avoid be a victim is don’t play where “hole cameras” are in use.
Another but with less direct affect on any particular player, there was the Boomtown Casino in Harvey, LA (NOLA) BBJP deck stacking.
https://www.fox8live.com/story/37472...dealer-player/
But the ones you actually need to defend against would be (imo) reusing to pay after losing, hiding big chips, adding/removing chips during hand (esp all ins.) the biggest that we “all” protect against and likely have been victimized by but don’t know it arehole card peaking. Either alone or by teams.