Why Bitcoin forks? Exchanges would be where the fraud happens. MtGOX was insolvent and yet they inflated the price of Bitcoin across all exchanges. Bitfinex is alleged to be engaging in the same market manipulation through margin wash trades and their central bank scheme of free Tether minting.
Bitcoin forks are funny because it's decentralized software with a shared database history from the time of the fork. After an update, users can choose to use one or the other. Unfortunately the incentives are warped for miners and devs, so users might not have the best possible design.
There's an excessive amount of propaganda surrounding cryptocoins because "investors" need to psychologically lure you in to buy their supply, which they've acquired for significantly lower value, lower capital, and lower computational work then you if you're starting after them.
[0] https://medium.com/@bitfinexed/latest