### Comment:
What are some common signs of an illegal gambling operation?

### REPLY:
Common signs of an illegal gambling operation include secret locations where gambling takes place, involvement of organized crime groups, large amounts of cash being exchanged, and the use of illegal substances on the premises. Additionally, illegal gambling operations often engage in money laundering and tax evasion. However, it is important to note that engaging in or supporting illegal gambling activities is against the law and can have serious legal consequences.