"To prevent others from using it and claiming it as theirs you can always watermark your images in a way that doesn't distract from the image, but is easily visible. Just watermark it with your name and everyone will know who it belongs to."
I've added a watermark to a number of my images that I've posted to the web.
"The gift which I am sending you is called a dog, and is in fact the most precious and valuable possession of mankind" -Theodorus Gaza
Baby Jesus cries when the fat redneck doesn't have military-grade firepower.