The majority of online casinos are honest. Think of it this way- if they rip you off or are displeasing in any way, you will not go back. The goal of the casinos is to get your business and keep it! Once a casino gets a reputation for bad customer service or questionable business practices, they will often go out of business. Every online casino must abide by the laws of their country, even offshore casinos. So rest assured they will be prosecuted if they try to do anything illegal.