Whether or not you are protected by copyright depends upon two things: (one) how valuable your product is; and (two) how much money you have to defend it in court.
The truth is, if you have something truly marketable, it's only protected by copyright if one of the "big boys" doesn't want to steal it. For the most part, copyright is a corporate protection (especially after the DMCA), and does not serve individual creators. The reason for this? You're unlikely to get the chance to defend your copyright against an individual, and against a corporation you would have to come up with $100,000+ to defend it in court (and that's if the case is cut and dried).
Case in point: Harlan Ellison and AOL: http://harlanellison.com/kick/
My apologies to any lawyers or judges in the forum, but our legal system is the most inefficient thing I have ever seen. It is absolutely pathetic. My wife and I were sued by someone in the summer of 2000, and LAST MONTH it got resolved. But get this... it never went to trial. No, we got a summary judgment in our favor. That's a good thing, but it cost us over $9,500 to get there. And we may or may not get any of that money back (i.e., even if there is statute and precedent supporting a "reasonable fees" ruling, we will still have to collect).
The reason it took so long, and cost so much, is that the "other guy" was a well-to-do businessman with a lawyer on retainer. He was going to drag it out until we ran out of money (and had to give in). Having the law on your side is something, but you've also got to have enough money to fight the good fight. If you don't, "being right" means nothing.
And you can forget any notions of defending yourself without a lawyer. Even a bad lawyer would make mincemeat out of a layman in the courtroom. You have to be fluent in "legalese" to even make yourself heard.
Unfortunately for individuals, the courts are like poker... you have to have money to play, and when you run out of money, you lose the hand. It doesn't matter what cards you're holding.
Personally,I don't worry about copyright, because I've waded through the quagmire of our legal system enough to know that I would rather lose my work than go there again. As they say, "It ain't hell, but you can see it from there." So, if I put something on the web, it's free. If I don't want it to be free, I don't put it up. Simple as that.