Gambling entities will always attract mobs likely do to its inherit business dealings. In Asian specifically Maccau money laundering is big business there. Large sum of money goes through the casinos and when they are traded for the chips the money can be exchanged to USD and consider clean and use abroad. This process will likely never end since casino will always have flow of money. Like you said always safer to find a reputable business so at the very least don't lose before I even place a bet. Thanks.