Ok, so I have a question. There are so many amazing pictures on this thread that I like to use them as my computer wallpaper at work. I used to always send a message to the person and ask permission and they would say go ahead and use it. I stopped asking - I only use it for my wall paper, and in all honesty if someone comments on it I am quick to say I didn't take it. Am I allowed to do this or am I supposed to ask for permission? Thanks.