Just a heads up, your second link does not discuss any fraud of the players and instead discusses money laundering which the sites had to engage in to pay players from the United States. UltimateBet and AbsolutePoker had a massive cheating scandal, and both they and FullTilt were insolvent and werent able to pay back the players. Pokerstars has shown time and again that they are operating on the up and up, and many of the other pokersites are part of publicly traded companies.
The biggest concern is that of bots, and while some sites arent very vigilant about banning suspected bots, Pokerstars is.
In short, play on reputable sites, and if you are worried about bots, then play at pokerstars and report anything suspicious. Are there cheaters? Yes, but it is easier for a site to detect cheating when they have access to all hands played by every account than it would be for a casino who has none of that information.
The biggest concern is that of bots, and while some sites arent very vigilant about banning suspected bots, Pokerstars is.
In short, play on reputable sites, and if you are worried about bots, then play at pokerstars and report anything suspicious. Are there cheaters? Yes, but it is easier for a site to detect cheating when they have access to all hands played by every account than it would be for a casino who has none of that information.