Can I use this image from the internet?
A while ago, an individual asked whether he could use on a commercial website an image he found on the internet, that apparently was being used by a fair number of websites. My first reaction was no. My second reaction was probably not, unless the image was in the public domain; the copyright holder had released the image under a permissive license, like a Creative Commons license; or your use of the image qualifies as a fair use (fair use can be a complex area of law, and presenting a fair use argument can be expensive). My third reaction was don't assume that because other websites are using an image that means you can use it.