The only time I would ever be concerned about protecting copyrights of my photos is if there is a person in there, otherwise if someone wants to use my photo's, I really don't care. Web resolution jpegs only offer so much, if they want to take that, be my guest. If they want to reproduce it in photo - they will have a tough time even getting a good 4x6 out of it.

But yes, pictures of people is a whole other matter, I do take those copyright protections very seriously. But if some travel agency "steals" your landscape photo to advertise the Hawaii vacation, what skin is it off your back? Sometimes I feel like some photographers are like Lars Ulrich in that Napster fiasco, boo-hoo! ;)