unfortunate necessity for people who depend on their work for income and/or who don't want others claiming credit . In most cases it damages the image enough I wouldn't fav it because the pleasure of viewing it again is gone. I have seen a few images where the watermark actually added an interesting element but that is very rare
Watermarks has been an ongoing argument around here for a long time now. Personally I don't like them at all. I think a signature as part of the picture would be better. But, I also have to agree, they can be a necessary evil. Have a great week, and don't forget your camera.