[Reel Deal]

I don't think it's the participation aspect that these laws are trying to prevent, I see no rational reason why (or how) the government would pass a law that prevents people from playing poker on-line for free (ie, play chips). It's the gambling aspect that these laws are trying to prevent and so your analogy to other sports becomes irrelevant since in the majority of jurisdictions betting on NASCAR or any other sport is illegal. Whether betting is based on skill or chance, it's the betting (gambling) that the government is trying to curtail.