just because something is made in fla doesn't mean anything.... There are tons of gambling sites that are flash based. However, i think it can be done another way. Thanks for your input, even though it was kind of dickish.
There is not problem with ui in flash but every action on player side can be simulated and cheated even without browser. Gambling sites have no problem with flash because game logic is processed on server - it has nothing to do with flash.