Hello, Frank. Well "yes".....I have noticed here on WGT that there are many profile photos that use cartoons, drawings, photos of celebrities, etc.......but, I came across a VERY detailed website of an Attorney in Los Angeles, Calif. who specializes in "copyright" laws (including how they are involved on the Internet). He states that, the rule of thumb is, if you do not have "written permission" to use a photo, image, etc., don't use it. And that "copyright infringement:" IS "copyright infringement" regardles of one's "motive". Even a new photo or image found on the Internet carries with it, copyright protection for 75 yrs.
It's about "doing the right thing".......but, this really doesn't seem important to people any longer. If I were the owners of WGT (and I know....I'm not)....I'd require members to either us an avatar OR a "real photo" of themselves.
But, I realize, there are not WGT rules about the photo or image that you can use for your Profile pic. I was just trying to make a point, that's all.