I used to have a page on my website where I posted them all for everyone to enjoy. Then I got a nasty cease and desist order from one of the copyright holders and a bill for $6000, so I took it down.
Wha......??!!! Why.....??!!........That's astonishing !!
Basicaly, if you post copyrighted material online without permission, the copyright holder can charge whatever he or she wants as a licensing fee. Many regular people are getting hit with bills for thousands or even hundreds of thousands of dollars. The copyright holders are using automated software to scan the web for reproductions of their copyrighted images.
Even if you are not using the picture to make money ?? Just posting it as a joke or to make a point? Just about every "person, place or thing" has an images tab when you google it. Dang.... my own avatar is probably copyrighted