In chapter 14 of Ace on the River, Barry Greenstein explains how poker players can protect themselves from cheating, theft, and other non-obvious risks by relying on judgment, caution, and situational awareness rather than paranoia.
Poker Is Usually Honest—But Not Always
Greenstein begins by acknowledging that most poker games are fair, but emphasizes that money always attracts opportunists. Protection starts with “poker sense”: the same instinct people use in everyday life to judge whom to trust and when a situation feels wrong. Players should not normalize dangerous conditions simply because a game is convenient or familiar.
Choosing Safe Playing Environments
He strongly favors casinos over private games, especially in areas where casinos are readily available. In unfamiliar home games, players may face excessive rake, poorly shuffled or marked cards, or biased dealers. If a home game is unavoidable, it is safer when trusted players vouch for it.
Within casinos, Greenstein recommends using chips instead of cash, depositing winnings securely, and never signaling to strangers that you carry large amounts of money.
Personal Safety Outside the Poker Room
Greenstein extends protection beyond the table. Players leaving games—especially late or with winnings—should be alert to their surroundings, check whether they are being followed, and carry a phone in case of trouble. Visibility and caution reduce vulnerability.
Awareness of Sophisticated Cheating Methods
Even casinos are not immune to cheating. Greenstein describes how cheating can involve insiders, marked or stacked decks, false shuffles, signaling devices, or electronic assistance. Because many of these methods are hard to prove, a player’s main defense is noticing when losses do not align with logical betting patterns.
At the same time, he cautions against assuming cheating without evidence—poor players often misinterpret normal variance as foul play.
The Limits of Casino Surveillance
Surveillance systems exist, but Greenstein reminds readers that casinos primarily protect themselves, not individual players. High-stakes games receive more scrutiny because more money is at risk. When cheating is discovered, casinos typically handle it quietly to avoid legal issues and reputational damage.
Collusion and Information Leaks at the Table
Players can cheat by signaling partners, sharing information, or coordinating betting strategies. Greenstein advises protecting hole cards carefully and being alert when opponents make unusually accurate decisions.
At higher stakes, collusion is less common because players understand betting logic better and reputations matter more. Players who behave dishonestly at high levels are often excluded from future games.
Friends, Staking, and Ethical Gray Areas
Sometimes players have financial arrangements or close friendships within the same game. Greenstein advises not to assume wrongdoing automatically. Instead, assess whether such relationships harm you. In some cases, transparent and honorable alliances can actually be exploited, since players may overcompensate to avoid appearing unethical.
Tournament-Specific Risks
In tournaments, chip-swapping, soft play between friends, and improper chip movement can occur, especially across multiple events. While rare, these issues matter most near final tables. Greenstein advises verifying chip counts and speaking up if something clearly unethical occurs.
Online Poker Vulnerabilities
Online play introduces new risks, including collusion through outside communication, multiple accounts, and potential data security issues. Greenstein recommends using basic computer security measures and reviewing hand histories if suspicious patterns emerge.
Ultimately, his advice is simple: if online results consistently feel unnatural or unfair, the best protection is to stop playing.
Core Message of the Chapter
Greenstein’s central lesson is that self-protection in poker depends on judgment, awareness, and the willingness to walk away. No environment is completely safe, but players who choose games carefully, protect themselves physically and financially, and trust their instincts can greatly reduce their exposure to danger.