It's difficult for me to come up with what unintended consequences might result from these bills, but I can cite a recent fiasco that happened here in Virginia a month or so ago.
Some legislator came up with the idea that the blue laws (those that force businesses to close on Sunday, the Christian Sabbath) had outlived their usefulness. On this topic, I agree. Separation of church and state and all that. Anyway, they (whoever they are) thought they had dug up all the laws on the topic, listed them, and wrote a bill repealing them all. Unfortunately, they missed one that apparently had been overridden by one that was being repealed, so it would have again taken effect, and it said something about businesses being required to give their employees Sundays off. So if you're a supermarket, or any business large enough to hire people, and you want to be open on Sunday, you have to give your staff the day off anyway. Fortunately, they caught the problem before the bill was enacted.
[disclaimer]This rendition of actual events was taken from my memory of newspaper accounts, so there may well be errors in fact in it.[/disclaimer]
When it comes to tracking software, many web sites (particularly those that sell you things) put a little file affectionately called a "cookie" on your hard drive. This allows them to keep track of who you are so you don't have to log in on every screen. Beethoven.com does this as well, so it knows when barfle or OperaTenor or Shapley or audiogirl pops in to post a message, we don't have to log in either.
Whether or not these bills would affect how cookies operate, I have no idea. But when lawyers start trying to dictate technology, the general public rarely does anything but lose.