Look at so called Regulated brokers that have ran away with peoples deposits and nothing has happened..
First of all lets clarify when we say broker are we talking about OTC FX/ CFD or Equity/ Futures
With Equity, most countries have some sort of insurance or a Recovery fund , USA = SIPC, UK = FCSC, etc
With FX and Futures : Only checks and balances Except in UK and may be few of the EU countries
Fraud can happen any place, how does that argument justify using thinly regulated "broker"
Unless those who promote have vested interest!
TO give you a racing example
IF both the Bookmaker and the Pari Mutul board are offering similar odds Why would I bother with a Bookies when the pari mutual system provider has no conflict with if I win or loose! while to survive
the Bookmaker does need t most of the punters to loose
The Pari Mutual board is only interested in punters participating same way a True Exchange is interested in traders "participating"
Any way it is your money if you want to take a risk of using such dodgy brokers it is your risk, but don;t pretend that that is same as choosing a properly regulated and perhaps better Exchange Traded product