I have witnessed almost the same thing before and it was known as drag racing here in our country. It's actually an underground and illegal car or motorcycle racing because it could cause harm to the racers physically. To hide this event, they're not using any plate number and they aren't even wearing safety gears.
On the other hand, despite all the risks, lots of people still bet on it because it's fun and exciting. Some gamblers also prefer the thrill and excitement that it could give them, unlike legal gambling.
Legal gambling could really be still enjoyable like those who do able to see on illegal ones, thing here is that those events that arent really legalized doesnt really involved
any strict rules or whatsoever. Winner takes it all.
I do also some of people here on my country on having such betting.I havent personally able to see or visit up these places but those friends of mine are really fan
on going into these places to check it out.
For online betting then i havent tested it out because im not really that much interested on car racing.