Some people do that, I don't think it's a huge problem but I simply can't afford to get sued by someone who feels slighted. That's why I, personally, think it's best to ask permission; or get written permission to really cover your butt. Whenever I show something on my website that was commissioned by a builder or owner, I note it. Most of the stuff on there now [that's getting kinda old], I did for fun.
Hope I didn't step on any toes here. If I did, Sorry!
