Idle question regarding internet gambling

(_Not_ internet gamboling, which would be something else entirely...)

With the US gummint taking a sudden interest in squashing internet gambling sites, probably related to a lack of tax or graft rake-off therein, I was wondering something. How do you identify a rigged roulette wheel, cold deck, or loaded dice over the internet? Cheating always has been a way of life in Real Life -- I learned to recognize a "mechanic's grip" for dealing seconds back when I was maybe ten or twelve...

Hell, you don't even know if the guy across the virtual poker table is "real," playing with "real" money.